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Re: power of positive thinking

Started by John Forrest Tomlinson · · Last activity · 20 posts · 1,149 views

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Cycling Equipment
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20 June 2008
Last activity
22 June 2008
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John Forrest Tomlinson
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  1. Quoted message said:

    Alas, the calculators predict that Joe was yet another victim of
    weight-weenie wishful thinking--surely you should be able to feel the
    difference when you start pushing the pedals of a bike 1/3 lighter!

    You might not be able to feel the difference in speed (though 3% is
    conceivably noticeble), but you surely can feel some difference
    (perhaps it's handling, perhaps it's stability/instaility).

    Funny that a difference that large in bike weight is derided as
    weigh-weeniness. Funny that 3% in time is considered weeniness.

    Dear Carl. Please place a six pound piece of lead on your bike and
    leave it there for the next year or so.

    Cheers,

    JT

  2. John Forrest Tomlinson said:

    You might not be able to feel the difference in speed (though 3% is
    conceivably noticeble), but you surely can feel some difference
    (perhaps it's handling, perhaps it's stability/instaility).

    I think "handling" is the major difference that folks notice. The
    lighter bike is a little easier to push around the road. I see the
    same thing with (much) lighter sports cars - although they may have
    the same, or often lower ratings on the skid pad, they are still a lot
    more fun to toss around the road.

    Quoted message said:

    Funny that a difference that large in bike weight is derided as
    weigh-weeniness. Funny that 3% in time is considered weeniness.

    3% matters in the TDF. On a pleasure ride, it would have to be much
    more.

    Quoted message said:


    Dear Carl. Please place a six pound piece of lead on your bike and
    leave it there for the next year or so.

    Interesting idea. Carl?

  3. still just me said:

    3% matters in the TDF. On a pleasure ride, it would have to be much
    more.

    It matters in even lower level racing. It might even "matter" if
    you're just trying to beat your buddy up a long hill. That's up to
    the rider what matters -- if the result of the ride is different and
    noticeable, then it matters.

    Heck, 3% is 100 times as good if you win something instead of losing.

  4. John Forrest Tomlinson said:
    Quoted message said:

    Alas, the calculators predict that Joe was yet another victim of
    weight-weenie wishful thinking--surely you should be able to feel the
    difference when you start pushing the pedals of a bike 1/3 lighter!

    You might not be able to feel the difference in speed (though 3% is
    conceivably noticeble), but you surely can feel some difference
    (perhaps it's handling, perhaps it's stability/instaility).

    Funny that a difference that large in bike weight is derided as
    weigh-weeniness. Funny that 3% in time is considered weeniness.

    Dear Carl. Please place a six pound piece of lead on your bike and
    leave it there for the next year or so.

    Cheers,

    JT

    Dear John,

    Joe explicitly talked about "forward thrust" and "cruising speed," not
    stability or handling, neither of which are likely to be noticeable on
    a 92-mile Ride-the-Rockies tour on the highway--pavement posted at 65
    mph doesn't usually highlight subtle handling improvements.

    What time difference would you predict adding seven pounds to my
    current ~220 pound bicycle-and-rider combination (steel with frame
    bag, seat bag, and camera bag) would make at my average speed on a
    daily 15-mile ride, which is back down to just under 50 minutes after
    illness?

    Would the improvement in my "forward thrust" be "noticeably robust"
    without a stop watch? It's a tiny 0.5 km/h for a smaller rider on a 6%
    grade?

    Would I start "cruising at a more-than-respectable" clip? The
    improvement is less than a practically unmeasurable 0.1 km/h on the
    flats.

    Let's see . . .

    First, let's pretend that it's a flat ride, ignoring that 400-foot
    ridge west of town.

    15.1 miles = 24.35 km

    24.35 km / (5/6 hour) = 29.22 km/h

    190 lb rider = 86.4 kg

    5,000 feet = 1523 meters

    25 lb bike = 11.4 kg

    32 lb bike = 14.5 kg

    A sizzling 138 watts predicts the desired 29.2 km/h for the 86.4 kg
    rider and 11.4 kg bike on this side-by-side calculator:
    http://bikecalculator.com/veloMetricNum.html

    Raising the bike weight seven pounds to 14.5 kg lowers the speed from
    29.25 km/h to 29.14 km/h, 0.11 km/h slower.

    It takes an extra 2 kcal.

    Time rises from 49.95 to 50.14 minutes, 0.19 minutes. That's 11.4
    seconds on a 3,000 second ride.

    In other words, you'd need a lot of rides, a stopwatch, and a big
    spreadsheet to show the difference in real life. (My daily time varies
    considerably more than 11.4 seconds because of the wind.)

    No human being can detect that difference without instruments.

    It's a good example of how we pursue real improvements that are too
    small to measure outside of laboratory-control conditions.

    In real life, the lighter bike should indeed be ever-so-slightly
    faster. But real life variables like wind, temperature, barometric
    pressure, tire inflation, and what you ate for breakfast yesterday
    will swamp that tiny improvement--we're kidding ourselves when we
    think that we can "feel" a bike cruising 0.11 km/h faster at 29 km/h.

    Joe was riding an unfamiliar 92-mile stretch of mountain highway with
    plenty of encouragement and even pressure to believe that there was a
    "robust" improvement in how fast he could go.

    Limit the test to a 6% grade and you'll get a bigger difference, but
    it's still too small for a human being riding on his own on an
    unfamiliar stretch of highway to detect, even with a good cyclometer.

    You're grinding 13.5 km/h up this new road on a 92-mile ride. You
    don't know whether someone has put 7 pounds of lead weights in your
    bike's frame.

    Are you going faster or slower? The lead weights will change your
    speed, one way or the other, only 0.5 km/h.

    If you know that you're riding an $8500 bike that's 7 pounds lighter,
    you're likely to believe that you're going much faster.

    I'm sure that Joe "felt" the speed differences, but adding or removing
    7 pounds doesn't make a difference that anyone can detect on that
    92-mile ride with the seat of his pants. It takes a stopwatch and
    plenty of tests to tease that kind of tiny speed difference out of
    real rides.

    Cheers,

    Carl Fogel

  5. Carl Fogel said:
    Quoted message said:
    Quoted message said:

    Alas, the calculators predict that Joe was yet another victim of
    weight-weenie wishful thinking--surely you should be able to feel
    the difference when you start pushing the pedals of a bike 1/3
    lighter!

    Quoted message said:
    Quoted message said:

    You might not be able to feel the difference in speed (though 3% is
    conceivably noticeble), but you surely can feel some difference
    (perhaps it's handling, perhaps it's stability/instaility).

    Quoted message said:
    Quoted message said:

    Funny that a difference that large in bike weight is derided as
    weigh-weeniness. Funny that 3% in time is considered weeniness.

    Quoted message said:
    Quoted message said:

    Dear Carl. Please place a six pound piece of lead on your bike and
    leave it there for the next year or so.

    Quoted message said:

    Joe explicitly talked about "forward thrust" and "cruising speed,"
    not stability or handling, neither of which are likely to be
    noticeable on a 92-mile Ride-the-Rockies tour on highway pavement
    posted at 65 mph doesn't usually highlight subtle handling
    improvements.

    Quoted message said:

    What time difference would you predict adding seven pounds to my
    current ~220 pound bicycle-and-rider combination (steel with frame
    bag, seat bag, and camera bag) would make at my average speed on a
    daily 15-mile ride, which is back down to just under 50 minutes
    after illness?

    Quoted message said:

    Would the improvement in my "forward thrust" be "noticeably robust"
    without a stop watch? It's a tiny 0.5 km/h for a smaller rider on a
    6% grade?

    Quoted message said:

    Would I start "cruising at a more-than-respectable" clip? The
    improvement is less than a practically unmeasurable 0.1 km/h on the
    flats.

    When reading these promotional phrases by unwitting shills, I think
    they don't ride any significant distances on climbs (like Mt. Evans)
    or the mountains around here:

    http://www.rntl.net/mthamiltonlookout.htm

    4209ft above the Santa Clara Valley and across the other side, the
    coast range of 3000 to 4000ft mountains.

    Quoted message said:

    Let's see...

    Quoted message said:

    First, let's pretend that it's a flat ride, ignoring that 400-foot
    ridge west of town.

    Quoted message said:

    15.1 miles = 24.35 km

    Quoted message said:

    24.35 km / (5/6 hour) = 29.22 km/h

    Quoted message said:

    190 lb rider = 86.4 kg

    Quoted message said:

    5,000 feet = 1523 meters

    Quoted message said:

    25 lb bike = 11.4 kg

    Quoted message said:

    32 lb bike = 14.5 kg

    Quoted message said:

    A sizzling 138 watts predicts the desired 29.2 km/h for the 86.4 kg
    rider and 11.4 kg bike on this side-by-side calculator:

    http://bikecalculator.com/veloMetricNum.html

    Quoted message said:

    Raising the bike weight seven pounds to 14.5 kg lowers the speed
    from 29.25 km/h to 29.14 km/h, 0.11 km/h slower.

    Quoted message said:

    It takes an extra 2 kcal.

    Quoted message said:

    Time rises from 49.95 to 50.14 minutes, 0.19 minutes. That's 11.4
    seconds on a 3,000 second ride.

    Quoted message said:

    In other words, you'd need a lot of rides, a stopwatch, and a big
    spreadsheet to show the difference in real life. (My daily time
    varies considerably more than 11.4 seconds because of the wind.)

    Quoted message said:

    No human being can detect that difference without instruments.

    Quoted message said:

    It's a good example of how we pursue real improvements that are too
    small to measure outside of laboratory-control conditions.

    Quoted message said:

    In real life, the lighter bike should indeed be ever-so-slightly
    faster. But real life variables like wind, temperature, barometric
    pressure, tire inflation, and what you ate for breakfast yesterday
    will swamp that tiny improvement--we're kidding ourselves when we
    think that we can "feel" a bike cruising 0.11 km/h faster at 29
    km/h.

    Quoted message said:

    Joe was riding an unfamiliar 92-mile stretch of mountain highway
    with plenty of encouragement and even pressure to believe that there
    was a "robust" improvement in how fast he could go.

    Quoted message said:

    Limit the test to a 6% grade and you'll get a bigger difference, but
    it's still too small for a human being riding on his own on an
    unfamiliar stretch of highway to detect, even with a good
    cyclometer.

    Quoted message said:

    You're grinding 13.5 km/h up this new road on a 92-mile ride. You
    don't know whether someone has put 7 pounds of lead weights in your
    bike's frame.

    Quoted message said:

    Are you going faster or slower? The lead weights will change your
    speed, one way or the other, only 0.5 km/h.

    Quoted message said:

    If you know that you're riding an $8500 bike that's 7 pounds
    lighter, you're likely to believe that you're going much faster.

    Quoted message said:

    I'm sure that Joe "felt" the speed differences, but adding or
    removing 7 pounds doesn't make a difference that anyone can detect
    on that 92-mile ride with the seat of his pants. It takes a
    stopwatch and plenty of tests to tease that kind of tiny speed
    difference out of real rides.

    I think that trying to reduce it to more than total rider and bicycle
    weight times the gradient is not understood by people who believe
    these promotional phrases.

    Jobst Brandt

  6. Quoted message said:
    John Forrest Tomlinson said:

    On Fri, 20 Jun 2008 00:40:52 -0600, [email hidden] wrote:


    [...]

    Quoted message said:
    Quoted message said:

    Dear Carl. Please place a six pound piece of lead on your bike and
    leave it there for the next year or so.

    Cheers,

    JT

    Dear John,

    Joe explicitly talked about "forward thrust" and "cruising speed," not
    stability or handling, neither of which are likely to be noticeable on
    a 92-mile Ride-the-Rockies tour on the highway--pavement posted at 65
    mph doesn't usually highlight subtle handling improvements.

    What time difference would you predict adding seven pounds to my
    current ~220 pound bicycle-and-rider combination (steel with frame
    bag, seat bag, and camera bag) would make at my average speed on a
    daily 15-mile ride, which is back down to just under 50 minutes after
    illness?

    Would the improvement in my "forward thrust" be "noticeably robust"
    without a stop watch? It's a tiny 0.5 km/h for a smaller rider on a 6%
    grade?

    Would I start "cruising at a more-than-respectable" clip? The
    improvement is less than a practically unmeasurable 0.1 km/h on the
    flats.

    Let's see . . .

    First, let's pretend that it's a flat ride, ignoring that 400-foot
    ridge west of town.

    15.1 miles = 24.35 km

    24.35 km / (5/6 hour) = 29.22 km/h

    190 lb rider = 86.4 kg

    5,000 feet = 1523 meters

    25 lb bike = 11.4 kg

    32 lb bike = 14.5 kg

    A sizzling 138 watts predicts the desired 29.2 km/h for the 86.4 kg
    rider and 11.4 kg bike on this side-by-side calculator:
    http://bikecalculator.com/veloMetricNum.html

    Raising the bike weight seven pounds to 14.5 kg lowers the speed from
    29.25 km/h to 29.14 km/h, 0.11 km/h slower.

    It takes an extra 2 kcal.

    Time rises from 49.95 to 50.14 minutes, 0.19 minutes. That's 11.4
    seconds on a 3,000 second ride.

    In other words, you'd need a lot of rides, a stopwatch, and a big
    spreadsheet to show the difference in real life. (My daily time varies
    considerably more than 11.4 seconds because of the wind.)

    No human being can detect that difference without instruments.

    I'm not so sure: human beings are capable of extraordinary sensitivity
    to unexpected things. A snooker player for example will know at once if
    you've exchanged his favourite cue for another one that's practically
    identical. A racing driver could tell if you'd changed his tyres for
    ones that were a little bit more or less worn (even though the
    difference in speed might be less than a second over a lap).

    So maybe the nice bike does really _feel_ nicer to some riders, even if
    the differences on paper only matter if you're racing at a high level.

  7. "Ben C" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:


    I'm not so sure: human beings are capable of extraordinary sensitivity
    to unexpected things. A snooker player for example will know at once if
    you've exchanged his favourite cue for another one that's practically
    identical. A racing driver could tell if you'd changed his tyres for
    ones that were a little bit more or less worn (even though the
    difference in speed might be less than a second over a lap).

    So maybe the nice bike does really _feel_ nicer to some riders, even if
    the differences on paper only matter if you're racing at a high level.

    Test after test shows that human beings - even the most sensitive ones -
    can't tell the difference between even very familiar things if that
    difference is below about 2%.

    I thought that I could tell my Look KG241 from my Basso Loto but after
    trying to tell the difference in ride the only thing I could detect was that
    when you hit a really large bump the steel bike jumps more than the carbon
    fiber one. And that difference is probably 5% in flex.

  8. Quoted message said:

    Carl Fogel wrote:

    [snip]

    Quoted message said:
    Quoted message said:

    Would the improvement in my "forward thrust" be "noticeably robust"
    without a stop watch? It's a tiny 0.5 km/h for a smaller rider on a
    6% grade?

    Quoted message said:

    Would I start "cruising at a more-than-respectable" clip? The
    improvement is less than a practically unmeasurable 0.1 km/h on the
    flats.

    When reading these promotional phrases by unwitting shills, I think
    they don't ride any significant distances on climbs (like Mt. Evans)
    or the mountains around here:

    http://www.rntl.net/mthamiltonlookout.htm

    4209ft above the Santa Clara Valley and across the other side, the
    coast range of 3000 to 4000ft mountains.

    [snip calculations]

    Quoted message said:

    I think that trying to reduce it to more than total rider and bicycle
    weight times the gradient is not understood by people who believe
    these promotional phrases.

    Jobst Brandt

    Dear Jobst,

    You're probably right that going through the details with the
    calculators is more than some posters are willing to follow.

    There's a tiny improvement when a bike loses 7 pounds, but we agree
    it's not likely to be anything that a rider can actually notice.

    When I read the Ride-the-Rockies article about the lighter bike's
    "robust forward thrust," I couldn't help thinking of you happily
    riding up Alpine passes and California climbs that daunt most riders.

    I suspect that the secret of your "robust forward thrust" is not an
    ultra-light $8500 10-speed carbon-fiber frame disguised as a yellow
    steel 6 or 7 speed:
    http://i1.tinypic.com/505ukc2.jpg

    Enviously,

    Carl Fogel

  9. Quoted message said:

    Dear Jobst,

    You're probably right that going through the details with the
    calculators is more than some posters are willing to follow.

    Dear Carl.

    Please add six pounds to your bike overwhateve it is now. It
    shouldn't be costly. Indeed, you might even do so in a way that makes
    your machine more durable

    Cheers,

    JT

  10. On Jun 20, 6:10 pm, John Forrest Tomlinson <[email hidden]>

    Quoted message said:
    Quoted message said:

    Dear Jobst,

    Quoted message said:

    You're probably right that going through the details with the
    calculators is more than some posters are willing to follow.

    Dear Carl.

    Please add six pounds to your bike overwhateve it is now.  It
    shouldn't be costly.  Indeed, you might even do so in a way that makes
    your machine more durable

    I can only repeat, sort of, that instead of adding weight, Mr. Fogel
    should go the other direction, maybe get a ride on one of those
    demonstrators he mentioned. Kind of like seeing how the other half
    lives, if you will. --D-y

  11. Ben C said:
    Quoted message said:
    John Forrest Tomlinson said:

    On Fri, 20 Jun 2008 00:40:52 -0600, [email hidden] wrote:


    [...]

    Quoted message said:
    Quoted message said:

    Dear Carl. Please place a six pound piece of lead on your bike and
    leave it there for the next year or so.

    Cheers,

    JT

    Dear John,

    Joe explicitly talked about "forward thrust" and "cruising speed," not
    stability or handling, neither of which are likely to be noticeable on
    a 92-mile Ride-the-Rockies tour on the highway--pavement posted at 65
    mph doesn't usually highlight subtle handling improvements.

    What time difference would you predict adding seven pounds to my
    current ~220 pound bicycle-and-rider combination (steel with frame
    bag, seat bag, and camera bag) would make at my average speed on a
    daily 15-mile ride, which is back down to just under 50 minutes after
    illness?

    Would the improvement in my "forward thrust" be "noticeably robust"
    without a stop watch? It's a tiny 0.5 km/h for a smaller rider on a 6%
    grade?

    Would I start "cruising at a more-than-respectable" clip? The
    improvement is less than a practically unmeasurable 0.1 km/h on the
    flats.

    Let's see . . .

    First, let's pretend that it's a flat ride, ignoring that 400-foot
    ridge west of town.

    15.1 miles = 24.35 km

    24.35 km / (5/6 hour) = 29.22 km/h

    190 lb rider = 86.4 kg

    5,000 feet = 1523 meters

    25 lb bike = 11.4 kg

    32 lb bike = 14.5 kg

    A sizzling 138 watts predicts the desired 29.2 km/h for the 86.4 kg
    rider and 11.4 kg bike on this side-by-side calculator:
    http://bikecalculator.com/veloMetricNum.html

    Raising the bike weight seven pounds to 14.5 kg lowers the speed from
    29.25 km/h to 29.14 km/h, 0.11 km/h slower.

    It takes an extra 2 kcal.

    Time rises from 49.95 to 50.14 minutes, 0.19 minutes. That's 11.4
    seconds on a 3,000 second ride.

    In other words, you'd need a lot of rides, a stopwatch, and a big
    spreadsheet to show the difference in real life. (My daily time varies
    considerably more than 11.4 seconds because of the wind.)

    No human being can detect that difference without instruments.

    I'm not so sure: human beings are capable of extraordinary sensitivity
    to unexpected things. A snooker player for example will know at once if
    you've exchanged his favourite cue for another one that's practically
    identical. A racing driver could tell if you'd changed his tyres for
    ones that were a little bit more or less worn (even though the
    difference in speed might be less than a second over a lap).

    So maybe the nice bike does really _feel_ nicer to some riders, even if
    the differences on paper only matter if you're racing at a high level.

    Dear Ben,

    Try to find someone who can detect without instruments the speed
    difference on 92 miles of Colorado highway caused by removing 7 pounds
    from a bicycle.

    "Feel" is not really the question. Replies have wandered off into
    handling and agility and vibration and so forth, but Joe Hudson's
    comments were about "forward thrust" and "cruising speed," which are
    objective matters of how far you go in a given time.

    If Joe can "feel" the difference of 0.1 km/h in crusing speed, he's
    more sensitive than most cyclocomputers and somehow corrects for road
    roughness, air temperature, altitude, and quite a few other factors.

    As for racing drivers, that's pretty much a myth. They rely on the pit
    crew's stop watches to find out what equipment combinations are
    actually faster. Their "feelings" about speed are notoriously
    unreliable, which is hardly surprising, given the tremendous physical
    stress of modern car racing and the tiny differences involved in lap
    times. Without electronic timing, modern racing would be chaos. If
    you're interested, "The Physics of NASCAR" gives some details about
    such things.

    Cheers,

    Carl Fogel

  12. Quoted message said:
    Ben C said:

    On 2008-06-20, [email hidden] <[email hidden]> wrote:


    [...]

    Quoted message said:
    Quoted message said:
    Quoted message said:

    Time rises from 49.95 to 50.14 minutes, 0.19 minutes. That's 11.4
    seconds on a 3,000 second ride.

    In other words, you'd need a lot of rides, a stopwatch, and a big
    spreadsheet to show the difference in real life. (My daily time varies
    considerably more than 11.4 seconds because of the wind.)

    No human being can detect that difference without instruments.

    I'm not so sure: human beings are capable of extraordinary sensitivity
    to unexpected things. A snooker player for example will know at once if
    you've exchanged his favourite cue for another one that's practically
    identical. A racing driver could tell if you'd changed his tyres for
    ones that were a little bit more or less worn (even though the
    difference in speed might be less than a second over a lap).

    So maybe the nice bike does really _feel_ nicer to some riders, even if
    the differences on paper only matter if you're racing at a high level.

    Dear Ben,

    Try to find someone who can detect without instruments the speed
    difference on 92 miles of Colorado highway caused by removing 7 pounds
    from a bicycle.

    "Feel" is not really the question. Replies have wandered off into
    handling and agility and vibration and so forth, but Joe Hudson's
    comments were about "forward thrust" and "cruising speed," which are
    objective matters of how far you go in a given time.

    If Joe can "feel" the difference of 0.1 km/h in crusing speed, he's
    more sensitive than most cyclocomputers and somehow corrects for road
    roughness, air temperature, altitude, and quite a few other factors.

    As for racing drivers, that's pretty much a myth. They rely on the pit
    crew's stop watches to find out what equipment combinations are
    actually faster. Their "feelings" about speed are notoriously
    unreliable, which is hardly surprising, given the tremendous physical
    stress of modern car racing and the tiny differences involved in lap
    times. Without electronic timing, modern racing would be chaos. If
    you're interested, "The Physics of NASCAR" gives some details about
    such things.

    You make a good case, and I think you're probably right.

  13. <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:


    As for racing drivers, that's pretty much a myth. They rely on the pit
    crew's stop watches to find out what equipment combinations are
    actually faster. Their "feelings" about speed are notoriously
    unreliable, which is hardly surprising, given the tremendous physical
    stress of modern car racing and the tiny differences involved in lap
    times. Without electronic timing, modern racing would be chaos. If
    you're interested, "The Physics of NASCAR" gives some details about
    such things.

    Actually when I worked with racing motorcycles the opinions of the riders
    were almost irrelevant. Many time a faster engine would feel slower simply
    because I'd widened the power band and that caused the bike to accelerate
    more smoothly and the rider would swear it was slower despite what the watch
    said.

  14. Quoted message said:

    Try to find someone who can detect without instruments the speed
    difference on 92 miles of Colorado highway caused by removing 7 pounds
    from a bicycle.

    Dear Carl,

    If it doesn't matter, we can only assume you are happy to add the 7.

  15. On Jun 21, 8:52 am, John Forrest Tomlinson <[email hidden]>

    Quoted message said:
    Quoted message said:

    Try to find someone who can detect without instruments the speed
    difference on 92 miles of Colorado highway caused by removing 7 pounds
    from a bicycle.

    Dear Carl,

    If it doesn't matter, we can only assume you are happy to add the 7.

    Improved roadholding. --D-y

  16. On Jun 21, 6:52 am, John Forrest Tomlinson <[email hidden]>

    Quoted message said:

    Dear Carl,

    If it doesn't matter, we can only assume you are happy to add the 7.

    JFT...Since I can't even PRETEND to understand physics the only thing
    I have to contribute here is this:
    Bianchi, 1998, 28 lbs.
    While riding this baby my bathroom scale went from 180 to 165.

    Trek, 2007, 23 lbs.
    And while riding this my bathroom scale went from 165 to 163.
    Doh!!!

    My conclusion: the cheaper older heavier bike was "better" for what I
    want to do.
    And since I'm not happy with these results, I had been thinking of
    adding back 5 lbs of excess weight onto the Trek.
    Since I think Carl is right, I'll take 5 of those 7, and since I think
    you're right too, Carl can add only the extra 2.
    Anybody who doesn't agree with my Solomonic proposal can meet me in
    the alley for a Marquis of Queensbury.

    Bike, bike, bike, meow,
    ABS

  17. John Forrest Tomlinson said:


    Carl Fogel said:


    Alas, the calculators predict that Joe was yet another victim of
    weight-weenie wishful thinking--surely you should be able to feel the
    difference when you start pushing the pedals of a bike 1/3 lighter!

    You might not be able to feel the difference in speed (though 3% is
    conceivably noticeble), but you surely can feel some difference
    (perhaps it's handling, perhaps it's stability/instaility).

    Funny that a difference that large in bike weight is derided as
    weigh-weeniness.  Funny that 3% in time is considered weeniness.

    Dear Carl.  Please place a six pound piece of lead on your bike and
    leave it there for the next year or so.

    I have a tool roll that I move around among all my bikes. It weighs a
    few pounds-- less than six, but probably three or four. When I
    combine it with a tube, a decent pump, a lock, and the bag to hold all
    these things, I reckon that I've got at least six pounds of weight
    that I add to any given bike when I ride.

    I have never noticed any effect of that "extra weight", but I will say
    this: My rides are more comfortable when I have those things along
    with me than when I forget them.

    Chalo

  18. On Sat, 21 Jun 2008 06:17:50 -0700, "Tom Kunich" <cyclintom@yahoo.

    com said:

    <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:


    As for racing drivers, that's pretty much a myth. They rely on the pit
    crew's stop watches to find out what equipment combinations are
    actually faster. Their "feelings" about speed are notoriously
    unreliable, which is hardly surprising, given the tremendous physical
    stress of modern car racing and the tiny differences involved in lap
    times. Without electronic timing, modern racing would be chaos. If
    you're interested, "The Physics of NASCAR" gives some details about
    such things.

    Actually when I worked with racing motorcycles the opinions of the riders
    were almost irrelevant. Many time a faster engine would feel slower simply
    because I'd widened the power band and that caused the bike to accelerate
    more smoothly and the rider would swear it was slower despite what the watch
    said.

    Dear Tom,

    Your opening "Actually" seems to suggest disagreement, but everything
    else agrees with what I wrote.

    So we're on the same page here, right?

    Cheers,

    Carl Fogel

  19. <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    On Sat, 21 Jun 2008 06:17:50 -0700, "Tom Kunich" <cyclintom@yahoo.

    com said:


    Actually when I worked with racing motorcycles the opinions of the riders
    were almost irrelevant. Many time a faster engine would feel slower simply
    because I'd widened the power band and that caused the bike to accelerate
    more smoothly and the rider would swear it was slower despite what the
    watch
    said.

    Your opening "Actually" seems to suggest disagreement, but everything
    else agrees with what I wrote.

    So we're on the same page here, right?

    We're mostly on the right page save the fact that you're attempting to argue
    where a simple mild disagreement exists.

  20. On Sat, 21 Jun 2008 14:18:00 -0700, "Tom Kunich" <cyclintom@yahoo.

    com said:

    <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    On Sat, 21 Jun 2008 06:17:50 -0700, "Tom Kunich" <cyclintom@yahoo.

    com said:


    Actually when I worked with racing motorcycles the opinions of the riders
    were almost irrelevant. Many time a faster engine would feel slower simply
    because I'd widened the power band and that caused the bike to accelerate
    more smoothly and the rider would swear it was slower despite what the
    watch
    said.

    Your opening "Actually" seems to suggest disagreement, but everything
    else agrees with what I wrote.

    So we're on the same page here, right?

    We're mostly on the right page save the fact that you're attempting to argue
    where a simple mild disagreement exists.

    Dear Tom,

    Now I'm baffled.

    What was the mild disagreement?

    As far as I could tell, we were saying the same thing.

    Please go back and look at what you replied to.

    Cheers,

    Carl Fogel

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