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Thread: UCI standards on disc brakes and axel specifications for road competition 2017 and on

  1. #21
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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    I hope 12mm axles go away, I look forward to all of my bikes using the same axle standards again. 15mmx100 and 12x142 are already in place and work well.
     

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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    SRAM 140 rotors did not do so well in Utah.
    -Dustin

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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    if this and the 160 spec is true then flatmount seems a tad...

    Quote Originally Posted by dashDustin View Post
    SRAM 140 rotors did not do so well in Utah.
    Nick Crumpton
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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    The real issue is neutral support, and hence teams, have to know what standards will be in place, not just recommendations. For example, if Contador gets a flat and is not able to get a wheel from his team car, then he must rely on the race neutral support. What happens when his bike with 140mm disc wheels do not accept the 160mm disc wheels from the neutral support?

    Another example. Cavendish flats and his Scott frame/fork which accepts a 100 x 12mm front axle can't get a front wheel from his team car. He has to rely on the race's neutral wheel support and they only have 100 x 15mm thru axle front wheels. This is a real scenario and one reason why Trek decided to stick with the more common 100 x 15mm thru axle standard. You just can't change end caps on a 15mm thru axle hub to a 12mm thru axle hub midway through a race.
     

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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    Quote Originally Posted by dashDustin View Post
    SRAM 140 rotors did not do so well in Utah.
    What happened in Utah? For those of us that don't know.
     

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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    Quote Originally Posted by acorn View Post
    What happened in Utah? For those of us that don't know.
    I'm not referring to the race.

    But 140 rotors weren't capable of dissipating the heat quick enough on the road. Trail, sure. Road, not so much.
    -Dustin

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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    What about the safety of the disc itself, will there be a UCI or industry standard?

    I'm thinking of a smooth outer diameter, not a sawtooth, with a radiused edge, would be a good idea.
    Tödd Höllând

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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    I confess...I am looking forward to the clu$terfuck....
     

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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    "Oh good heavens you mechanical monster....how long will it take to get a wheel change?"

    "Sensors indicate approximately 20 minutes"
    Attached Images Attached Images
     

  10. #30
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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    It won't take much longer than with lawyer tabs.
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    T h o m a s

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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    Quote Originally Posted by sk_tle View Post
    It won't take much longer than with lawyer tabs.
    the thru axle threads pitch is that coarse that a few rotations and you can yank it out?

    I haven't had the pleasure of playing with TA yet.
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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    Quote Originally Posted by sk_tle View Post
    It won't take much longer than with lawyer tabs.

    True. At least with lawyer tabs, a mechanic can file those things off and you would essentially be free of the lawyer tabs slowing down your wheel change on a quick-release bike. Not really sure there is a way to speed up the time-consuming winding/screw-on action to get a thru-axle wheel on.
     

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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    UCI regulations do not allow that anymore.
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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    Why are they going 140x12? Couldnt the added width cause issues for some riders with certain foot positions and foot size? I mean, I like through axles and all, but IDK. Is it just for extra brake caliper clearance?
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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    No it is about self centering rotors which is good for fast wheel changes. It doesn't change anything in term of foot size/position.
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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    Quote Originally Posted by s_curran View Post
    Why are they going 140x12? Couldnt the added width cause issues for some riders with certain foot positions and foot size? I mean, I like through axles and all, but IDK. Is it just for extra brake caliper clearance?

    Actually, 142mm wide rear is what I think you meant. And, I know this sounds weird, but 142mm wide rear is identical to 135mm wide in terms of cog spacing width. It's kinda hard to explain and everytime I do, I only confuse more people. Essentially, the widths and important stuff means that with all important parameters...
    142mm rear = 135mm rear.
     

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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    Quote Originally Posted by acorn View Post
    Actually, 142mm wide rear is what I think you meant. And, I know this sounds weird, but 142mm wide rear is identical to 135mm wide in terms of cog spacing width. It's kinda hard to explain and everytime I do, I only confuse more people. Essentially, the widths and important stuff means that with all important parameters...
    142mm rear = 135mm rear.
    tell them the axle sits further into the dropout to set in place because the skewer doesn't hold it in.
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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    They're specifying dropout and axle, right? Not necessarily thread pitch? Focus' RAT system is pretty damn awesome, compared to the alternative.
    -Dustin

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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    Got it, thanks, I wasn't aware of the way it sits in the dropouts, in which case, cool. I was thinking 7mm less heal clearance.
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    Default Re: UCI standards on disc brakes and axel specifications for road competition 2017 an

    Quote Originally Posted by s_curran View Post
    Got it, thanks, I wasn't aware of the way it sits in the dropouts, in which case, cool. I was thinking 7mm less heal clearance.
    heal clearance will be the frame design and really has no relation when comparing these two axle types.
    Matt Moore
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