2017 'PRO' cycling discussion.

Questions about bike hire abroad and everything light bike related. No off-topic chat please

Moderators: robbosmans, Moderator Team

Locked
User avatar
Tomstr
Posts: 572
Joined: Tue Oct 04, 2011 5:04 pm

by Tomstr

I'm guessing the temperature was somewhere between 5 and 10 degrees celcius which means the disc must have been much hotter. Easily warm enough to get a 1st degree (rotor)burn.
Ride it like you stole it

User avatar
Lelandjt
Posts: 833
Joined: Tue Jan 19, 2016 7:10 am

by Lelandjt

Yes roadies, disc rotors get well over 200°F easily and will burn your leg if you bump into them. Many mountain bikers learned this in the early 2000s the hard way, a "rotor tatoo" burned into your calf while waiting for your friends to finish a downhill. The rear rotors on my enduro bikes are blued.

A rental shop told me they're gonna stop renting disc road bikes cuz people think the brakes are invincable and abandon all braking technique and common sense. They're spending too much replacing warped rotors and worn out pads. They were Specialized bikes and I think all used 140mm rotors.

by Weenie


Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓    Broad Selection ✓    Worldwide Delivery ✓

www.starbike.com



KWalker
Posts: 5722
Joined: Mon Dec 28, 2009 8:30 pm
Location: Bay Area

by KWalker

Weird, I know quite a few "pro" downhill and enduro riders who have never commented on having burn or heat issues.

Anyways, this is the pro thread not the disc thread. Maybe eventually companies will devote more to cooler operating temps or shields for the brakes. It's clear that they work better the key arguments left are how to get the weight more in line with current brakes and any remaining safety issues even if they are freak accidents. I'm still surprised that we are not seeing issues in CX or MTB with cuts and burns. CX is much lower speed, but discs have been on XC bikes for so damn long that if it were that risky I would think there would have been a few incidents by now.
Don't take me too seriously. The only person that doesn't hate Froome.
Gramz
Failed Custom Bike

wingguy
Posts: 4318
Joined: Thu Mar 08, 2012 11:43 pm

by wingguy

KWalker wrote:Weird, I know quite a few "pro" downhill and enduro riders who have never commented on having burn or heat issues.

At the Andorra DH world champs last year Loic Bruni did a course preview run, and since he was dragging the brakes a bit so the ex-pro commentator could keep up he had a total rear brake failure with boiled fluid 3/4 of the way down. And that's on a 4 pot brake. That's hot.

I'm still surprised that we are not seeing issues in CX or MTB with cuts and burns. CX is much lower speed, but discs have been on XC bikes for so damn long that if it were that risky I would think there would have been a few incidents by now.

I don't watch much CX but in XC the only time you'd ever see a mass pileup would be out of the start gate, when speeds are low and brake rotors are stone cold.

Look, I don't have an issue with discs in road racing (and anyone trying to stop it is just pissing in the wind - discs are coming) but there are potential issues with discs in road racing that wouldn't arise in any ofroad format because of the fundamental differences in how the races unfold.

petepeterson
Posts: 1402
Joined: Fri Jan 07, 2011 6:58 am
Location: 604

by petepeterson

If you are worried about getting burnt by hot rotor on a descent pro cycling or any racing probs isn't for you....

pastronef
Posts: 1640
Joined: Fri Mar 11, 2011 11:33 am
Location: Asti, ITALIA

by pastronef

wingguy wrote:Look, I don't have an issue with discs in road racing (and anyone trying to stop it is just pissing in the wind - discs are coming but there are potential issues with discs in road racing that wouldn't arise in any ofroad format because of the fundamental differences in how the races unfold.



bolded part: 100% right. no matter what we say, like it or not, discs are coming. there´s no going back.
give it 3 years
almost everybody on discs by Tokio 2020
it´s the market, Shimano wants them. Shimano sponsors the UCI.
Last edited by pastronef on Wed Feb 08, 2017 9:53 pm, edited 2 times in total.

wingguy
Posts: 4318
Joined: Thu Mar 08, 2012 11:43 pm

by wingguy

Pete, I'm pretty sure you don't make a living riding your bike either so what exactly is your point?

I'm actually not worried about getting burnt by a rotor or about them causing many issues in road racing (though there are several successful pro cyclists who are, maybe they should hand back their contracts) but I do know that a single hard stop can make a rotor extremely hot and I do know that racing conditions and common types of crash in CX and XC are very different from those in road races, and therefore you can't point to those types of races as a proving ground for disc safety in the pro peloton.

Pointing out logical problems with an argument isn't the same as agreeing or disagreeing with a conclusion.

User avatar
micky
Posts: 5765
Joined: Thu Sep 21, 2006 8:57 pm
Location: Vicenza
Contact:

by micky

Image

mattr
Posts: 4671
Joined: Fri May 25, 2007 6:43 pm
Location: The Grim North.

by mattr

KWalker wrote:Weird, I know quite a few "pro" downhill and enduro riders who have never commented on having burn or heat issues.
Well, no, they wouldn't, same way you don't get many complaints about bad bunch riding on time trial stages.

KWalker wrote:that if it were that risky I would think there would have been a few incidents by now.
There have. Several. Even at WC level.
I've even had the joy of picking a disc shaped scab off my calf. And that was only a low speed shuffle through a narrow bit of the track a couple of km in from the start.

User avatar
Tomstr
Posts: 572
Joined: Tue Oct 04, 2011 5:04 pm

by Tomstr

What Mattr said.

Discbrakes will happen, yes. The industry wants us to buy something new and wants to standardize at the same time.

Covers should happen too. With the current weight limit this should not be an issue. Same as for aero, a carbon cover could be very slippery and light and still look the business.
Ride it like you stole it

User avatar
tymon_tm
Posts: 3665
Joined: Tue Sep 05, 2006 4:35 pm

by tymon_tm

well, as for now motors and vehicles injure far more riders than any equipment faults. it's beyond any doubt last thing manufacturers want is to cause spectacular injuries to their riders - what's worse than a dangerous, expensive upgrade that scares you (or your parents) every time you go for a ride. that wouldn't play out well sales-wise. of course you can't 'crash test' discs, or simulate pile-up crashes, but I suppose they gotta have the safety issues figured out - somehow. of course if something nasty should happen that doesn't kill the whole disc (r)evolution, but if it does happen over and over again, customers will notice, and so will the riders who have a massive influence these days via social media. there's a lot at stake here - financially wise - which adds at least a lil bit of assurance the whole thing won't go south.
kkibbler wrote: WW remembers.

User avatar
Snabb
Posts: 103
Joined: Tue Apr 10, 2012 1:43 am
Location: Sweden

by Snabb

Disc brakes are here to stay. My only concern is all the wheel changes, will Boonen and co just switch bikes at P-R?
I can`t imagine that they will change wheels with thru axles and and have to deal with rubbing brake pads etc. Same with big races like the tour, who would want to have a wheel change from the mavic car :lol:
Ride lots!

User avatar
prebsy
Posts: 1044
Joined: Tue Oct 23, 2012 10:52 pm
Location: there or thereabouts

by prebsy

the focus RAT system is insanely fast. i'm surprised other bike manufactures haven't implemented similar techs for the specific issue of fast in race wheel changes.

KWalker
Posts: 5722
Joined: Mon Dec 28, 2009 8:30 pm
Location: Bay Area

by KWalker

Mavic Speed Release is faster than RAT. Enve is releasing a compatible fork this month. I will have it on my disc bike by mid-March. My guess is something similar will be implemented on many large brand's bikes by 2018-2019
Don't take me too seriously. The only person that doesn't hate Froome.
Gramz
Failed Custom Bike

by Weenie


Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓    Broad Selection ✓    Worldwide Delivery ✓

www.starbike.com



User avatar
Kjetil
Posts: 2853
Joined: Sat Jul 30, 2011 1:17 pm
Location: Hamar, Norway
Contact:

by Kjetil

Wouldn't it be rather poetic if Mavic delivered the true heir of Campagnolo's great invention?
Bianchi-Campagnolo
The Specialissima
Gylne Gutuer, the UCI 1.2 bike race I invented.

Locked