*audible sigh* The USAC has never disallowed disc brakes. Good disc-equipped frames and forks have been available for the past several years.bruzer said:Personally I am excited about the inclusion of disc brakes (allowed back in June?).
Yeah, but the UCI influences bike design. Until now, its been impossible to build a competitive drop bar bike with disc brakes. Whether or not you need drop bars to be competitive is another question.pretender said:*audible sigh* The USAC has never disallowed disc brakes. Good disc-equipped frames and forks have been available for the past several years.
"This [...] does not affect local events, but the UCI will now allow disc brakes for international events."
It's always been possible to build up a competitive disc-equipped bike (Cannondale Optimo, Salsa Las Cruces, Redline Conquest, Conquest Pro, etc). Top-of-the-line bleeding-edge pro-approved? Probably not, but it's still to be seen whether the pro bikes will embrace discs or not.kbiker3111 said:Yeah, but the UCI influences bike design. Until now, its been impossible to build a competitive drop bar bike with disc brakes. Whether or not you need drop bars to be competitive is another question.
Dang Son, plenty of disc capable cx frames have been available over the years. Not "competitive" enough? Any number of the dozens of capable frame builders out there can and have been building them for some time. Allz ya gotta do is ask.kbiker3111 said:Until now, its been impossible to build a competitive drop bar bike with disc brakes.
I'd email USAC if I were you. Hard to guess what they'll go by.joness said:If they are actually measuring then the Racing Ralphs are legal and the Michelins are not. If they are going by what is on the sidewall the Michelins are legal and the Racing Ralphs are not.
Wouldn't disagree a bit on hydro vs cable brakes for mountain bikes.kbiker3111 said:*competitive = hydros
Anyone who's seriously mountain biked knows mech's can't hold a candle to hydros in power, modulation, weight, maintenance, etc.
A team mate of mine forwarded an email, sent to him from the regional UCI commissaire, which summarizing the UCI CX Seminar held July 10.jmoote said:I don't know about USAC, but the UCI commissaires will use a simple U-shaped gauge with a 33mm slot. USAC is just enforcing the UCI rules so I would think the same.
It doesn't matter what a tire is labelled, if it doesn't fit through the slot it's not legal. Pretty straightforward to follow.
So, yeah.....gauge doesn't fit over your tire, you're SOL.Tire width: The concern was raised that manufacturers have already delivered their inventory of tires to stores. The reason for the reduced maximum width of tires is to make it so not so much equipment is “required” to compete in CX. A UCI study revealed that >90% of the tires used for racing are 32 mm or smaller. The wider tires are more for “specialty use”. This new ruling should not have a very great impact on industry sales. The UCI will be providing a number of tire width gages to USAC. These will be thick acrylic to take into consideration the full width of the tire tread.