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MTB vs 'Cross?

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Published
17 February 2006
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22 February 2006
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(PeteCresswell)
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  1. What are the diffs between an MTB and a mountain cross bike?

    - SUS vs rigid fork

    - 26" vs 700c wheels

    - Flat vs Drop bars

    Anything else?

    I've heard a couple of people say that they use a 'cross bike as a touring/road
    bike.

    I've been thinking along those lines, but with a MTB frame as the basis instead
    of a 'cross frame.
    --
    PeteCresswell

  2. A modern cross bike doesn't make a very good touring bike. In the past
    a touring bike was used as a cross bike so it was the other way around.

    The only difference of any note between the old unsuspended mountain
    bikes and a cross bike is the tire width.

    Mountain bikes were meant to be ridden over EVERYTHING and so they have
    big wide balloons that will drag you through sticky mud without your
    having to put a foot down. But since cross bikes were meant as a kind
    of racing bike, it's faster to throw the bike over your shoulder and
    run. This way you're not only faster through the muddy section, but you
    don't get 30 lbs of mud caked on the bike jamming the wheels, the
    brakes and screwing up the derailleurs and shifting.

    It's my belief that suspension has really screwed up mountain biking.
    It has made it so easy that there's too little skill required. In order
    to increase the challenge of riding, whacked out MTBers now go down
    suicide hills and take wild chances at super speeds where a slip
    doesn't end in gravel rash as it once did but broken bones, shattered
    equipment and possible death.

    Real riders know this and that's why MTB sales are dropping among the
    cognoscenti and cyclocross bike sales are booming.

  3. Tom said:

    It's my belief that suspension has really screwed up mountain biking.
    It has made it so easy that there's too little skill required.

    If only this were true...

  4. (PeteCresswell) said:

    What are the diffs between an MTB and a mountain cross bike?

    - SUS vs rigid fork

    - 26" vs 700c wheels

    - Flat vs Drop bars

    Anything else?

    I've heard a couple of people say that they use a 'cross bike as a touring/road
    bike.

    I've been thinking along those lines, but with a MTB frame as the basis instead
    of a 'cross frame.

    The biggest difference I see in the frame if the BB height. Touring
    frames typically have a low BB, which makes it easier to dab at stops,
    but not so good for rock clearance.

  5. (PeteCresswell) said:

    What are the diffs between an MTB and a mountain cross bike?

    - SUS vs rigid fork

    - 26" vs 700c wheels

    - Flat vs Drop bars

    Anything else?

    I've heard a couple of people say that they use a 'cross bike as a touring/road
    bike.

    I've been thinking along those lines, but with a MTB frame as the basis instead
    of a 'cross frame.

    Well, I finally switched my "road bike" from an old Bontrager OR mtn
    bike frame with drop bars to a Soma Double Cross. The problem with
    using a mtn bike frame for the road is that the top tubes for a given
    size are much longer on the mtn bike frame. The Bontrager was a short
    top tube mtn bike since it was from long before Fisher's Genesis
    geometry (loooooooooooooooong top tubes, short stems) started
    influencing mtn bike geometries. My Bontrager and Soma have similar
    length seat tubes but the top tube on the Soma is almost 25mm shorter.

    Greg

    --
    "All my time I spent in heaven
    Revelries of dance and wine
    Waking to the sound of laughter
    Up I'd rise and kiss the sky" - The Mekons

  6. (PeteCresswell) said:

    What are the diffs between an MTB and a mountain cross bike?

    - SUS vs rigid fork


    no sus = lighter, better for sprinting (unless you have lockout)

    Quoted message said:

    - 26" vs 700c wheels

    700 can roll through thing better IMO

    Quoted message said:

    - Flat vs Drop bars


    drop bars matter if you're a road snop =D

    Quoted message said:


    Anything else?

    I've heard a couple of people say that they use a 'cross bike as a touring/road
    bike.

    heard of that as well. from what I learned it's becomes a case "it does
    it all, but does it badly". I'd pick one or the other, unless you don't
    care about performance.

    Quoted message said:


    I've been thinking along those lines, but with a MTB frame as the basis instead
    of a 'cross frame.

    I had a fully rigid city/mountain bike modified to be essentially a
    cross/commuter bike. Put on drop bars with barcons instead of the flat
    bars etc. I like it a lot. Only did one cross race with it last year
    though (in the snow with studded tyres).

    I like having the tyre choice with 26ers. I can put on huge tyres and
    plow through snow, ruts, rocks and fly downhill. Drop on some semi
    slicks and bounce on and off the road into fire trails and such. Or just
    slap on some slicks and cruise down the road. It's hard to find good
    semi slicks that are under 1.7s unfortunately.

    The only downside I find with it, is that 26ers don't roll through some
    things as well as a larger tyre (hence some peoples interest in 29s I
    guess) and it has a semi sloping top tube. Aside from that, I think it's
    fab. My LBS thought I was a bit nutty when I told them what I wanted to
    do with it, but they came around and thought it was pretty cool.

  7. "G.T." <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:
    (PeteCresswell) said:

    What are the diffs between an MTB and a mountain cross bike?

    - SUS vs rigid fork

    - 26" vs 700c wheels

    - Flat vs Drop bars

    Anything else?

    I've heard a couple of people say that they use a 'cross bike as a
    touring/road
    bike.

    I've been thinking along those lines, but with a MTB frame as the basis
    instead
    of a 'cross frame.

    Well, I finally switched my "road bike" from an old Bontrager OR mtn bike
    frame with drop bars to a Soma Double Cross. The problem with using a mtn
    bike frame for the road is that the top tubes for a given size are much
    longer on the mtn bike frame. The Bontrager was a short top tube mtn bike
    since it was from long before Fisher's Genesis geometry
    (loooooooooooooooong top tubes, short stems) started influencing mtn bike
    geometries. My Bontrager and Soma have similar length seat tubes but the
    top tube on the Soma is almost 25mm shorter.

    How does it work out for you?

    --
    Phil, Squid-in-Training

  8. Tom said:

    A modern cross bike doesn't make a very good touring bike. In the past
    a touring bike was used as a cross bike so it was the other way around.

    FWIW, it's quite possible to build a competent 'cross bike that will
    also serve very well for LIGHT touring and commuting (ask me how I
    know...). ;-) I agree that it would be difficult to optimize both
    off-road performance AND the ability to carry 80 pounds of gear over
    mountain passes... but if you can accept a
    "higher-than-normal-road-bike" bottom bracket for light touring and
    commuting, the design criteria for both aren't far enough apart that
    it's impossible to build a bike that does both quite well.

    Mark Hickey
    Habanero Cycles
    http://www.habcycles.com
    Home of the $795 ti frame

  9. Tom said:

    A modern cross bike doesn't make a very good touring bike. In the past
    a touring bike was used as a cross bike so it was the other way around.

    The only difference of any note between the old unsuspended mountain
    bikes and a cross bike is the tire width.

    Mountain bikes were meant to be ridden over EVERYTHING and so they have
    big wide balloons that will drag you through sticky mud without your
    having to put a foot down. But since cross bikes were meant as a kind
    of racing bike, it's faster to throw the bike over your shoulder and
    run. This way you're not only faster through the muddy section, but you
    don't get 30 lbs of mud caked on the bike jamming the wheels, the
    brakes and screwing up the derailleurs and shifting.

    It's my belief that suspension has really screwed up mountain biking.
    It has made it so easy that there's too little skill required. In order
    to increase the challenge of riding, whacked out MTBers now go down
    suicide hills and take wild chances at super speeds where a slip
    doesn't end in gravel rash as it once did but broken bones, shattered
    equipment and possible death.

    Real riders know this and that's why MTB sales are dropping among the
    cognoscenti and cyclocross bike sales are booming.

  10. (PeteCresswell) said:

    What are the diffs between an MTB and a mountain cross bike?

    I have never heard of a "a mountain cross bike."

    If you just mean a 'cross bike as in short for cyclocross bike, I've got one and
    think everyone else should too. Properly, these are race bikes, but the courses
    are so varied that building them as a specific race bike means they're still
    extremely versatile. They work well on the road, but are a good bit taller than
    a real loaded tourer. This shouldn't be a problem unless you are loading it up.

    If you mean "cross bike" as in the recently invented category that describes a
    flat bar bike sort of like a mountain bike but oriented more for casual riding
    on smooth trails, I don't know much about them. I do have an old real mountain
    bike a rigid 80s HooKooEKoo I use for just banging around. It fits the same
    profile as these "cross" bikes but is really better in just about every possible
    way.

    Quoted message said:

    - SUS vs rigid fork

    - 26" vs 700c wheels

    - Flat vs Drop bars

    Anything else?

    I've heard a couple of people say that they use a 'cross bike as a touring/road
    bike.
    I've been thinking along those lines, but with a MTB frame as the basis instead
    of a 'cross frame.

    Get an old school rigid mtb and build it to suit. Cheap too. Modern MTB frames
    are built around the suspension fork that you won't need unless you're bombing
    over roots and rocks.

    Ron

  11. "Phil, Squid-in-Training" <[email hidden]> wrote in
    message news:SnqJf.64918$bF.45769@dukeread07...

    Quoted message said:


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

    Quoted message said:

    Well, I finally switched my "road bike" from an old Bontrager OR mtn


    bike

    Quoted message said:
    Quoted message said:

    frame with drop bars to a Soma Double Cross. The problem with using a


    mtn

    Quoted message said:
    Quoted message said:

    bike frame for the road is that the top tubes for a given size are much
    longer on the mtn bike frame. The Bontrager was a short top tube mtn


    bike

    Quoted message said:
    Quoted message said:

    since it was from long before Fisher's Genesis geometry
    (loooooooooooooooong top tubes, short stems) started influencing mtn


    bike

    Quoted message said:
    Quoted message said:

    geometries. My Bontrager and Soma have similar length seat tubes but


    the

    Quoted message said:
    Quoted message said:

    top tube on the Soma is almost 25mm shorter.

    How does it work out for you?

    It's awesome, best road bike fit I've ever had. I think that's also because
    of the wealth of positive rise threadless stems out there now, I have the
    tops of the bars level with the seat which I've never had on any of my
    previous road bikes. Plus I love my Salsa Bell Laps, I ride in the drops
    most of the time now so I don't think I'm going to add 'cross brake levers
    to the tops.

    And with 29ers gaining popularity I can run tires that are almost as wide as
    the ~50mm tires I ran on the Bontrager. I can throw anything from 28mm road
    tires to 50mm front/42mm rear tires on this frame.

    Greg

  12. Per RonSonic:

    Quoted message said:

    I have never heard of a "a mountain cross bike."

    If you just mean a 'cross bike as in short for cyclocross bike,

    Mea Culpa. I'm kind of wrecked today. The damn cat was agitated all last
    nite. Must've been that monster front moving through. If I could have grabbed
    and thrown it outside without losing too much blood it would probably still be
    out there...
    --
    PeteCresswell

  13. The gearing is usually different. My MTB has a 20x34 lowest gear and a
    triple crank but my cyclocross bike has only a 34x30 with my dirt
    wheels mounted. A few 'cross bikes are being made with triple cranksets
    but most are geared more like a road bike.

    My 'cross bike clears a 42mm tire in the back with just 5mm on either
    side of the frame. So frame clearance is also a big difference.

  14. (PeteCresswell) said:

    What are the diffs between an MTB and a mountain cross bike?

    - SUS vs rigid fork

    - 26" vs 700c wheels

    - Flat vs Drop bars

    Anything else?....

    Does Mikey V. also hate cyclocross?

    --
    Tom Sherman

  15. In article <[email hidden]>,

    Quoted post said:

    The gearing is usually different. My MTB has a 20x34 lowest gear and a
    triple crank but my cyclocross bike has only a 34x30 with my dirt
    wheels mounted. A few 'cross bikes are being made with triple cranksets
    but most are geared more like a road bike.

    That's because you run with a 'cross bike when the going gets steep
    enough.

    There are nominal cyclocross bikes out there with triples, but the pure
    racing bikes (Euro stuff like the Empella, distinguished by light
    weight, big expense, and not having any eyelets) generally run doubles,
    and a lot of them end up with single front rings (and chainguards on
    boths sides) when actually raced.

    Quoted message said:

    My 'cross bike clears a 42mm tire in the back with just 5mm on either
    side of the frame. So frame clearance is also a big difference.

    The thing about cyclocross bicycles is that they have big clearances and
    cantis, making them suitable for fat tires, fenders, or both. They also
    tend to be lighter (and have racier geometry) than full-on touring
    bicycles.

    The beauty of a good cyclocross bike is that it can be light enough to
    credibly road-race, it works in cyclocross too, but the clearances (and
    eyelets, in the case of most of the more sensible frames) mean it can
    work as a fender-equipped bike, too.

    This versatility is really built into the nature of cyclocross event
    routes, which tend to be composed of every surface from ashphalt to deep
    mud, and lots of off-road surfaces in between.

    If I had to pare down to only one frame for some reason, it would be an
    easy choice to pick a 'cross machine, and I could happily use such a
    bike with minimal compromise for all my current rides: road racing,
    commuting, rides with fenders, cyclocross, and anything else that might
    come up.

    FWIW, my current "cyclocross" bike is a rather dreadful 1970s Motobecane
    touring frame, to which I have added a canti-equipped fork and mostly
    modern running gear. I use it for commuting and winter training. Come
    Fall, the fenders come off, the knobbies go on, and it's racing season.
    If I had to, I could race this bike in the summer too, but I have a
    roadworthy frame already (which, oddly enough, I raced cyclocross on
    last year).

    --
    Ryan Cousineau [email hidden] http://www.wiredcola.com/
    "I don't want kids who are thinking about going into mathematics
    to think that they have to take drugs to succeed." -Paul Erdos

  16. Tom said:


    It's my belief that suspension has really screwed up mountain biking.
    It has made it so easy that there's too little skill required. In
    order to increase the challenge of riding, whacked out MTBers now go
    down suicide hills and take wild chances at super speeds where a slip
    doesn't end in gravel rash as it once did but broken bones, shattered
    equipment and possible death.

    Hey I resemble that remark!

    http://www.pbase.com/mrdart/image/48475250

    Since there's no skill required you can come ride with me anytime. ;^)

    Quoted message said:


    Real riders know this and that's why MTB sales are dropping among the
    cognoscenti and cyclocross bike sales are booming.

    Fine with me. You "dirt roadies" can get off my trails and stop
    straightening out turns and removing obstacles. If you want straight and
    fast go back out on the road.

    Mike

  17. Michael Dart said:
    Tom said:


    It's my belief that suspension has really screwed up mountain
    biking. It has made it so easy that there's too little skill
    required. In order to increase the challenge of riding, whacked out
    MTBers now go down suicide hills and take wild chances at super
    speeds where a slip doesn't end in gravel rash as it once did but
    broken bones, shattered equipment and possible death.

    Hey I resemble that remark!

    http://www.pbase.com/mrdart/image/48475250

    Good grief. To each their own, but why not just buy a motorcycle and
    be done with it? All that bike is missing is an engine.

    Personally I'd rather have a bike that's fun to ride *uphill* and is
    good for something other than going down the fall line. Tastes vary,
    I guess. Enjoy your riding.

  18. Tim McNamara said:
    Michael Dart said:
    Tom said:


    It's my belief that suspension has really screwed up mountain
    biking. It has made it so easy that there's too little skill
    required. In order to increase the challenge of riding, whacked out
    MTBers now go down suicide hills and take wild chances at super
    speeds where a slip doesn't end in gravel rash as it once did but
    broken bones, shattered equipment and possible death.

    Hey I resemble that remark!

    http://www.pbase.com/mrdart/image/48475250

    Good grief. To each their own, but why not just buy a motorcycle and
    be done with it? All that bike is missing is an engine.

    Personally I'd rather have a bike that's fun to ride *uphill* and is
    good for something other than going down the fall line. Tastes vary,
    I guess. Enjoy your riding.

    Hehehe..I'll admit it's a bit excessive. But it's a ton of fun. I do have
    bikes for climbing and enjoy earning my turns as much as anyone.
    Downhilling is just a different aspect of cycling. Though I'll differ with
    anyone who says it's easy just because of suspension. All the suspension
    does is enable me to maintain control at speed.

    Mike

  19. (PeteCresswell) said:

    What are the diffs between an MTB and a mountain cross bike?

    - SUS vs rigid fork

    - 26" vs 700c wheels

    - Flat vs Drop bars

    Anything else?

    I've heard a couple of people say that they use a 'cross bike as a
    touring/road bike.

    I've been thinking along those lines, but with a MTB frame as the
    basis instead of a 'cross frame.

    Of my friends who've entered cross races on a MTB say they had a ton of fun
    but got smoked in the open due to not having enough gear inches to keep up
    riding a 26" wheel and MTB gearing. The chainstays are spread to allow a
    fat tire but won't allow a road size chainring. Suspension adds no
    advantage as 'cross courses are smoother with obstacles that require you to
    carry your bike across them. Suspension would be a liabilty by absorbing
    energy from pedaling forces.

    It can be done, and you'll have fun, but you won't be competitive with the
    true cross bikes.

    Mike

  20. In article <[email hidden]>, Mark Hickey

    Quoted message said:
    Tom said:

    A modern cross bike doesn't make a very good touring bike. In the past
    a touring bike was used as a cross bike so it was the other way around.

    FWIW, it's quite possible to build a competent 'cross bike that will
    also serve very well for LIGHT touring and commuting (ask me how I
    know...). ;-) I agree that it would be difficult to optimize both
    off-road performance AND the ability to carry 80 pounds of gear over
    mountain passes... but if you can accept a
    "higher-than-normal-road-bike" bottom bracket for light touring and
    commuting, the design criteria for both aren't far enough apart that
    it's impossible to build a bike that does both quite well.

    Corroborating your observations, my experience is that both types of
    bikes can competently serve as light tourers. But short chainstays on
    both designs can make the positioning of rear panniers awkward; and the
    range of tire sizes the CX'er (with full fenders) accommodates can also
    limit its capabilities.

    There are little details also. The majority of MTBs and CXers don't
    ship with forks equipped with low-rider mounting bosses so fitting a
    front rack and panniers requires improvisation. And on some (sloping
    top-tube) MTBs the seat-tube water bottle cage position precludes the
    use of taller water bottles.

    For a cross-country, fully loaded, self-supporting tour neither choice
    is best.

    Luke

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