Cycling Equipment · Public discussion

Durable Rims for Road Wheels - Recommendations?

Started by Steve Sr. · · Last activity · 73 posts · 1,345 views

Thread navigation

Jump through the discussion

Go to the original post, the replies on this page, or the latest preserved contribution.

Thread details

What we know about this thread

Original section
Cycling Equipment
Published
16 August 2006
Last activity
29 August 2006
Original author
Steve Sr.
Posts
73
Discussion status
Public discussion
Total views
1,345
Views / 30 days
0

The navigation and discussion metadata provide context. Posts remain in their original chronological order.

Showing posts 61–73 of 73
Posts remain in their original chronological order.

Text size
  1. Quoted message said:

    Since you insist, I suggest that you might ponder an instantaneous
    velocity (not speed) of 28.3 mph (not 25.5) at 45 degrees to the
    ground (not forward and not vertically) on a bicycle rim of any size
    whose axle is moving forward at 20 mph.

    It's impolite to ask your discussion partner to complete some
    mathematical excercise when you have repeatedly declined to do the one
    he has repeatedly asked of you:

    Quoted message said:

    Carl, you agree that a point on the rim will accelerate and decelerate
    twice per rotation. Do you also agree that the distance travelled


    per

    Quoted message said:

    rotation is 2piR forward, 0 backwards, 2R up, and 2R down?

    â

  2. 41 said:
    Quoted message said:

    Since you insist, I suggest that you might ponder an instantaneous
    velocity (not speed) of 28.3 mph (not 25.5) at 45 degrees to the
    ground (not forward and not vertically) on a bicycle rim of any size
    whose axle is moving forward at 20 mph.

    It's impolite to ask your discussion partner to complete some
    mathematical excercise when you have repeatedly declined to do the one
    he has repeatedly asked of you:

    Quoted message said:

    Carl, you agree that a point on the rim will accelerate and decelerate
    twice per rotation. Do you also agree that the distance travelled


    per

    Quoted message said:

    rotation is 2piR forward, 0 backwards, 2R up, and 2R down?


    True, however, in this case I'm afraid it might be for the better :-)

  3. "[email hidden]" <[email hidden]> wrote in
    news:[email hidden]:

    Quoted message said:

    Sun CR-18, half the price of a Mavic Open Pro, at least as durable, and
    a whopping 50 grams heavier (probably less than the Open Pro's
    manufacturing tolerance).

    It only has single eyelets.

    --
    Mike DeMicco <[email hidden]>

  4. In article <[email hidden]>,

    Mike DeMicco said:

    "[email hidden]" <[email hidden]> wrote in
    news:[email hidden]:

    Quoted message said:

    Sun CR-18, half the price of a Mavic Open Pro, at least as durable,
    and a whopping 50 grams heavier (probably less than the Open Pro's
    manufacturing tolerance).

    It only has single eyelets.

    Get used to it. Few rims have proper spoke nipple sockets these days.
    They are too expensive to fabricate and install, and cut into the profit
    margins from selling $60 rims plastered in meaningless tech jargon to
    fool the punters.

    That said, the CR-18 is actually quite durable, being polished rather
    than anodized. I've had good results with the polished Sun rims such as
    the CR-16a and the CR-18. Given the dearth of polished rims, these are
    the ones I would choose once my back stock of MA2s is gone.

  5. Tim McNamara said:

    In article <[email hidden]>,

    Mike DeMicco said:

    "[email hidden]" <[email hidden]> wrote in
    news:[email hidden]:

    Quoted message said:

    Sun CR-18, half the price of a Mavic Open Pro, at least as durable,
    and a whopping 50 grams heavier (probably less than the Open Pro's
    manufacturing tolerance).

    It only has single eyelets.

    Get used to it. Few rims have proper spoke nipple sockets these days.
    They are too expensive to fabricate and install, and cut into the profit
    margins from selling $60 rims plastered in meaningless tech jargon to
    fool the punters.

    I can't believe that cost per se has anything to do with it. The goal
    of the manufacturers seems to be to inflate the cost with useless
    features that cost money but detract from value. The MA2 was not an
    expensive rim, in constant dollars it is much cheaper than an Open Pro.

    Instead, it seems to me that the only selling point of them is
    durability. That has zero market value, and so the cost cannot be
    passed on to the final purchaser. On the other hand, value detractors
    such as machined sidewalls and welded joints can be sold, because they
    supposedly give you a better experience.

  6. Quoted message said:
    Steve Sr. said:

    I am looking to build a set of road wheels and am looking for
    suggestions for suitable rims. Of course, I would like them to be as
    light as possible without sacrificing the durability.

    While we all appreciate a litle nostalgia please limit your
    suggestions to rims that are still available.

    I suggest the ST17 "Elegant" from DRC, or if you need a more solid rim,
    try the ST19. However, for a 700C road wheel suitable for general use,
    including fast road riding, dirt tracks and reasonable luggage
    carrying, the ST17 is fine.

    As an alternative, consider the Ambrosio "Nexus". It has the same ERD
    as the Mavic MA2, which might allow you to use your old spokes. Both of
    these rims are double eyeletted, available in 36 hole with a silver
    finish.

    I have built wheels with both of these rims, and the results have been
    completely satisfactory.

    s.

    Do you know of an online reseller of the Nexus? I've been looking for
    some. FWIU, they actually bought the MA-2 die molds from Mavic, extrude
    the stock in France, then ship the stock to Italy where Ambrosio rolls
    them. I've got a set (relabelled for US sale as the "Torelli Master"😉
    and they're fine rims.

    I'm also a fan of the Ambrosio Excursion, their only other non-machined
    road rim.

  7. In article <[email hidden]>,

    41 said:
    Tim McNamara said:

    In article <[email hidden]>,

    Mike DeMicco said:

    "[email hidden]" <[email hidden]> wrote in
    news:[email hidden]:

    > Sun CR-18, half the price of a Mavic Open Pro, at least as
    > durable, and a whopping 50 grams heavier (probably less than
    > the Open Pro's manufacturing tolerance).

    It only has single eyelets.

    Get used to it. Few rims have proper spoke nipple sockets these
    days. They are too expensive to fabricate and install, and cut into
    the profit margins from selling $60 rims plastered in meaningless
    tech jargon to fool the punters.

    I can't believe that cost per se has anything to do with it. The goal
    of the manufacturers seems to be to inflate the cost with useless
    features that cost money but detract from value. The MA2 was not an
    expensive rim, in constant dollars it is much cheaper than an Open
    Pro.

    You're being very nice to the rim makers. The useless features are
    generally done in the extrusion or anodizing tank, so these can be done
    very cheaply with little or no extra time and little or no extra labor.
    Installing nipple sockets requires a machine to form the sockets,
    another to install them in the rim, and the people to run those
    machines. I would bet that removing that step cuts the cost of
    producing a rim in half. It probably costs $5 to produce a $60 rim now.

    Quoted message said:

    Instead, it seems to me that the only selling point of them is
    durability. That has zero market value, and so the cost cannot be
    passed on to the final purchaser. On the other hand, value detractors
    such as machined sidewalls and welded joints can be sold, because
    they supposedly give you a better experience.

    They're hypable and marketable. Durability is a cost center. If you
    can get the punters to buy a new rim or two every other year, zoom goes
    your profit margin.

    Every decision made about rim design is about the money, and how to fool
    John Q. Public into parting with ever more their wallet contents. The
    utter lack of critical independent testing (e.g., by bike magazines,
    motivated by ad revenue) is complicit in defrauding the public further.
    Thus we end up with break-o-matic rims and fragile plastic frames that
    can't withstand the normal bumps of daily life, all touted as "progress"
    to a gullible public who wants to Be Like Lance (except for the
    training, discipline and diet part). I love seeing fat guys on a Madone
    in full Discovery team kit...

    We need a resurrection of the Technical Trials in which equipment is
    subjected to rigorous, real life testing.

  8. On Sun, 27 Aug 2006 14:08:57 -0500, Tim McNamara
    <[email hidden]> wrote:

    [snip]

    Quoted message said:

    It probably costs $5 to produce a $60 rim now.

    [snip]

    Dear Tim,

    What accounts for the other $55?

    That is, if it costs a manufacturer only $5 to make the rim, what
    steps and middlemen do you think add $55 to the price?

    Cheers,

    Carl Fogel

  9. Tim McNamara said:

    In article <[email hidden]>,

    41 said:
    Tim McNamara said:

    In article <[email hidden]>,

    Mike DeMicco said:

    "[email hidden]" <[email hidden]> wrote in
    news:[email hidden]:

    > Sun CR-18, half the price of a Mavic Open Pro, at least as
    > durable, and a whopping 50 grams heavier (probably less than
    > the Open Pro's manufacturing tolerance).

    It only has single eyelets.

    Get used to it. Few rims have proper spoke nipple sockets these
    days. They are too expensive to fabricate and install, and cut into
    the profit margins from selling $60 rims plastered in meaningless
    tech jargon to fool the punters.

    I can't believe that cost per se has anything to do with it. The goal
    of the manufacturers seems to be to inflate the cost with useless
    features that cost money but detract from value. The MA2 was not an
    expensive rim, in constant dollars it is much cheaper than an Open
    Pro.

    You're being very nice to the rim makers. The useless features are
    generally done in the extrusion or anodizing tank, so these can be done
    very cheaply with little or no extra time and little or no extra labor.
    Installing nipple sockets requires a machine to form the sockets,
    another to install them in the rim, and the people to run those
    machines. I would bet that removing that step cuts the cost of
    producing a rim in half. It probably costs $5 to produce a $60 rim now.

    Quoted message said:

    Instead, it seems to me that the only selling point of them is
    durability. That has zero market value, and so the cost cannot be
    passed on to the final purchaser. On the other hand, value detractors
    such as machined sidewalls and welded joints can be sold, because
    they supposedly give you a better experience.

    They're hypable and marketable. Durability is a cost center. If you
    can get the punters to buy a new rim or two every other year, zoom goes
    your profit margin.

    Every decision made about rim design is about the money, and how to fool
    John Q. Public into parting with ever more their wallet contents. The
    utter lack of critical independent testing (e.g., by bike magazines,
    motivated by ad revenue) is complicit in defrauding the public further.
    Thus we end up with break-o-matic rims and fragile plastic frames that
    can't withstand the normal bumps of daily life, all touted as "progress"
    to a gullible public who wants to Be Like Lance (except for the
    training, discipline and diet part). I love seeing fat guys on a Madone
    in full Discovery team kit...

    We need a resurrection of the Technical Trials in which equipment is
    subjected to rigorous, real life testing.


    How do we get the "Technical Trials" going? Damon Rinard used to do some nice testing before Trek hired him.
    I am a fat guy that likes to ride and wishes I had the discipline of Lance and the time for training like he did. I spend a lot of my time building wheels. Ater 25 years+ of 10,000 miles+/year I slowed bicycle riding down considerably. (No full Team Discovery kit here, but a few US Postal items from the Master's Team left.)
    I don't think the sockets are a panacea. They make building wheels a little easier. Eyelets (even single ones like Sun CR-18, Velocity Synergy, etc.) usually make easier nipple alignment. I have experienced cracking around spoke holes more with rims that have eyelets/sockets than rims with no eyelets at all. I once put a new set of FIR rims in the recycle bin that were fully eyeletted/socketed when they cracked upon stress relieving them. I am not sure that in inner web walls of the rims helped support the additional forces, but every spoke hole had cracks around it with just one set of spoke squeezing.
    Fascinating features and claims for low mass are marketable.

  10. In article
    <[email hidden]>,

    Tim McNamara said:

    In article <[email hidden]>,

    Mike DeMicco said:

    "[email hidden]" <[email hidden]> wrote in
    news:[email hidden]:

    Quoted message said:

    Sun CR-18, half the price of a Mavic Open Pro, at least as durable,
    and a whopping 50 grams heavier (probably less than the Open Pro's
    manufacturing tolerance).

    It only has single eyelets.

    Get used to it. Few rims have proper spoke nipple sockets these days.
    They are too expensive to fabricate and install, and cut into the profit
    margins from selling $60 rims plastered in meaningless tech jargon to
    fool the punters.

    That said, the CR-18 is actually quite durable, being polished rather
    than anodized. I've had good results with the polished Sun rims such as
    the CR-16a and the CR-18. Given the dearth of polished rims, these are
    the ones I would choose once my back stock of MA2s is gone.

    I `discovered' CR-18 rims because they are the one decent
    ISO 630 rim to be had. They are better than most rims of
    any class, according to my lights. Durable, good looking,
    round; and they have eyelets.

    --
    Michael Press

  11. In article <[email hidden]>,

    Hank Wirtz said:
    Quoted message said:
    Steve Sr. said:

    I am looking to build a set of road wheels and am looking for
    suggestions for suitable rims. Of course, I would like them to be
    as light as possible without sacrificing the durability.

    While we all appreciate a litle nostalgia please limit your
    suggestions to rims that are still available.

    I suggest the ST17 "Elegant" from DRC, or if you need a more solid
    rim, try the ST19. However, for a 700C road wheel suitable for
    general use, including fast road riding, dirt tracks and reasonable
    luggage carrying, the ST17 is fine.

    As an alternative, consider the Ambrosio "Nexus". It has the same
    ERD as the Mavic MA2, which might allow you to use your old spokes.
    Both of these rims are double eyeletted, available in 36 hole with
    a silver finish.

    I have built wheels with both of these rims, and the results have
    been completely satisfactory.

    s.

    Do you know of an online reseller of the Nexus? I've been looking for
    some. FWIU, they actually bought the MA-2 die molds from Mavic,
    extrude the stock in France, then ship the stock to Italy where
    Ambrosio rolls them. I've got a set (relabelled for US sale as the
    "Torelli Master"😉 and they're fine rims.

    Hmm. IIRC the Torelli Master rim was not quite the same shape as the
    MA2. I haven't seen the Ambrosio Master, but according to their Web
    site Hewitt Cycles in the UK sells them (first hit on Google for
    "Ambrosio Nexus"😉:

    http://www.hewittcycles.co.uk/

    Also Deeside Cycles:

    http://deesidecycles.com/info/ambrosio.htm

    I think that EuroAsia is the U.S. importer of Ambrosio rims- you could
    have your LBS check the catalog for them.

  12. In article <[email hidden]>,

    Quoted message said:

    On Sun, 27 Aug 2006 14:08:57 -0500, Tim McNamara
    <[email hidden]> wrote:

    [snip]

    Quoted message said:

    It probably costs $5 to produce a $60 rim now.

    [snip]

    Dear Tim,

    What accounts for the other $55?

    I'd guess about $25 in profit to the manufacturer, plus

    Quoted message said:

    That is, if it costs a manufacturer only $5 to make the rim, what
    steps and middlemen do you think add $55 to the price?

    Shipping to the wholesaler, plus the wholesaler's profit; shipping to
    the retailer, plus the retailer's profit.

  13. Tim McNamara wrote:

    [snip]

    Quoted message said:

    That said, the CR-18 is actually quite durable, being polished rather
    than anodized. I've had good results with the polished Sun rims such as
    the CR-16a and the CR-18. Given the dearth of polished rims, these are
    the ones I would choose once my back stock of MA2s is gone.

    Dear TIm,

    I emailed Sun and asked:

    | Can you please tell me if the Sun CR 18 rim is polished, anodized, or
    | available in both versions?
    |
    | I couldn't tell from the web site and the downloaded catalogue

    Sun replied:

    | What size of CR18 were you looking for? Most of the size's are
    | available in both versions.

    Cheers,

    Carl Fogel

Active in the last 60 minutes

Active in this thread

0 users · 0 guests ·0 bots ·0 total

No signed-in users are active right now.

No known search crawlers active right now.