UCI to trial disc brakes?

[samhocking]

I bet the team mechanics wish the reset switch was already invented and here lol! Riders are going to have to get used to completely getting off their bike while the mechanic gets their bikes working fiddling with brake lever and caliper at the same time. Maybe the mechanic could bring a chair for the rider to sit on while they wait for their bike to be fixed? Could have some quick lunch or clean his sunglasses while he's' waiting perhaps? : )

 

[Tim B]

Re:

I honestly think it's up to the UCI to put their foot down and simply tell the manufactures to get their act together. Collectively they need to agree exact mounting point tolerances on frames and forks to be consistently within +-0.5mm of each other. Once you have the mounting points o nthe frame sorted, hub manufacturers need to have a similar exact standard rotor position in relation to the hub axle end points. At the moment they're all over the place. Once the rotor is in a consistent position, it should then just be a case for any manufacturer to make their calipers to the required specification to meet all the above, perhaps without any need to continue with a new auto-centering QR caliper technology to get around the tolerance issue. Everyone is then within 0.5mm no matter what equipment you use, everyone gets the benefit of disc braking, wide tyres and everyone can take any wheel knowing it will just work like the good old days of rim brakes.

Agreed, I think the UCI needed to take a more proactive approach in the first place to have all this sorted rather than letting it turn into the train wreck it seems to be. But, the UCI seems to be as slow to accept change as anyone else.
I can't help but also think that there are more motivations for the resistance behind the scenes than what we are being told. Campy doesn't have a solution, Pinarello say they don't care, maybe some of the patron's of the peloton are leading the charge and the others are following like sheep with their opinions, don't know.

Having a standard 160mm rotor with 12mm TA is one thing, but I think rotor allignment on the hub is the biggest issue. I have two wheelsets on my disc bike, both 6 bolt hubs (1 set are Hope, 1 are whatever Specialized use in the Roval wheels) both using Shimano RT86 icetech rotors, but the Hope hubbed wheels wouldn't even spin without 5 or 6 shims in them to match the Spesh wheelset. So for me now, swapping wheels is really fast, but that's the biggest issue to overcome in all of this. Hopefully a reset switch of some type will resolve this, but in my mind, you really want the caliper centered on the disc to provide even pressure without flexing the rotor, unless you can move the centre point of the caliper, without actually moving the caliper itself. As you say, get the hub manufacturers to produce their product to a standard, and most of these issues go away.

 

[Giuseppe Magnetico]

Re:

I bet the team mechanics wish the reset switch was already invented and here lol! Riders are going to have to get used to completely getting off their bike while the mechanic gets their bikes working fiddling with brake lever and caliper at the same time. Maybe the mechanic could bring a chair for the rider to sit on while they wait for their bike to be fixed? Could have some quick lunch or clean his sunglasses while he's' waiting perhaps? : )

Good one. I think they should just ditch the neutral wheel motos and set the teams up with cargo rated drones that carry an entire spare bike for every rider. It shows up within seconds of hitting a transponder to call it in. But I digress, every brake manufacturer has been trying to develop a disc caliper re-centering switch in one form or another, one certainly for the last 3 years. There's much more to it and coming very quickly. Enjoy your lunch while you wait.

 

[samhocking]

The drones will probably be better drivers than Shimano's neutral support ; )

 

[ice&fire]

The drones will probably be better drivers than Shimano's neutral support ; )

I can see drones taking gradully over the role of motos; that also includes collisions with riders

 

[42x16ss]

Re:

I bet the team mechanics wish the reset switch was already invented and here lol! Riders are going to have to get used to completely getting off their bike while the mechanic gets their bikes working fiddling with brake lever and caliper at the same time. Maybe the mechanic could bring a chair for the rider to sit on while they wait for their bike to be fixed? Could have some quick lunch or clean his sunglasses while he's' waiting perhaps? : )

So riders don't have to get off their bike for a wheel change already?

 

[King Boonen]

Re: Re:

I bet the team mechanics wish the reset switch was already invented and here lol! Riders are going to have to get used to completely getting off their bike while the mechanic gets their bikes working fiddling with brake lever and caliper at the same time. Maybe the mechanic could bring a chair for the rider to sit on while they wait for their bike to be fixed? Could have some quick lunch or clean his sunglasses while he's' waiting perhaps? : )

So riders don't have to get off their bike for a wheel change already?

The really small ones. Just hold the bike up with them on it.

 

[samhocking]

Generally, the rider stays on the bike and holds it and acts as a bike stand for the mechanic for a front wheel change. That's the fastest way.
Peter Sagan front wheel change:
https://www.youtube.com/watch?v=2C92mxWhc04

for a rear wheel some riders will jump off and remove rear wheel for mechanic first like this and hold the bike up:
https://youtu.be/0cnc78gBsqI?t=29s

You can see, once the mechanic has to press brake to centre the caliper after a wheel change, the rider really has to stand completely to one side to allow his to work on the bike. Different languages and teams have different ways of handling a wheel change so Neutral Service will probably insist the rider does nothing to keep things simple.

 

[pastronef]

https://www.twitter.com/SophieSmith86/status/834760828284985345

nice slice in Doull's shoe by a disc :surprised:

https://www.twitter.com/owaindoull/status/834775277150560256

 

[MagniflexOlmo]

As soon as we have a disk-brake-equipped rider crash into the back of another one, we're going to have a rider with his calf muscle sliced open and his time as a pro finished. (Think of an accident like Viviani had last year in Arrenberg). (And, yes, I have experienced this in a crit : Crash in front of me - I stop - 90kg rider piles into me - his QR completely bends the hell out of my rear, metal seat stay) To be safe, any cover would have to withstand the weight of a Kittel smashing down on it. At this rate, the UCI will soon be sued into bankruptcy by a disabled ex pro. Ban them.

 

[pastronef]

Adam Hansen comments

https://www.twitter.com/HansenAdam/status/834789463654010881

 

[hfer07]

just get rid of them immediately!!!!

the only people advocating for them are cyclocross & mountain bikers alike -- The fact is those blades become lethal in a 100 plus peloton crunched together just waiting to be sliced up when the next crash happens. Bottom line is those brakes have no place in Road Cycling at all!!! just stop it!!

 

[PremierAndrew]

I mean in a pileup, one of those disc brakes could easily end up near someone's neck. It's a no-brainer until disc brake covers are introduced and are effective enough

 

[King Boonen]

This looks very questionable. Got to 1:45 in the video on the report:

http://www.cyclingnews.com/races/abu-dhabi-tour-2017/stage-1/results/


Kittel looks a good 5-6 metres up the road from Doull if that's them? Were they anywhere near each other when they went down? That's the inside of his left shoe. He must have been behind Kittel for them to end up like that, I can't picture how that can happen to be honest.

 

[carolina]

Re:

This looks very questionable. Got to 1:45 in the video on the report:

http://www.cyclingnews.com/races/abu-dhabi-tour-2017/stage-1/results/


Kittel looks a good 5-6 metres up the road from Doull if that's them? Were they anywhere near each other when they went down? That's the inside of his left shoe. He must have been behind Kittel for them to end up like that, I can't picture how that can happen to be honest.

Kittel said that Doull was next to him when they fell. The handlebars got tangled and that was the cause of the crash.

 

[King Boonen]

Re: Re:

This looks very questionable. Got to 1:45 in the video on the report:

http://www.cyclingnews.com/races/abu-dhabi-tour-2017/stage-1/results/


Kittel looks a good 5-6 metres up the road from Doull if that's them? Were they anywhere near each other when they went down? That's the inside of his left shoe. He must have been behind Kittel for them to end up like that, I can't picture how that can happen to be honest.

Kittel said that Doull was next to him when they fell. The handlebars got tangled and that was the cause of the crash.

Which side? Because that's his left shoe and the discs are on the left. If it were his right shoe then I could see it being plausible, but his left? On the inside?

 

[carolina]

Found the quote

Before going into his team vehicle, Marcel Kittel explained what happened in the crash.

"I was in the wheel of Sabatini as we were closing in on the line, then Owain Doull came from the back and our handlebars got stucked in each other, and I crashed and lost some skin," he said via the Quick-Step team.

http://www.cyclingnews.com/races/abu-dhabi-tour-2017/stage-1/live-report/

I agree it's strange, but what else could have caused such a clean cut?

 

[King Boonen]

Re:

Found the quote

Before going into his team vehicle, Marcel Kittel explained what happened in the crash.

"I was in the wheel of Sabatini as we were closing in on the line, then Owain Doull came from the back and our handlebars got stucked in each other, and I crashed and lost some skin," he said via the Quick-Step team.

http://www.cyclingnews.com/races/abu-dhabi-tour-2017/stage-1/live-report/

I agree it's strange, but what else could have caused such a clean cut?

Yeah, I'm struggling to see how it happened. They crashed into the barriers, no doubt lots of sharp bits on metal on those, would possibly explain the rust-like colouring on the shoe too.

If they can show it's a disc then I'd be happy to say that's more than enough to remove them from the peloton, I just really can't see how it would happen.

 

[Escarabajo]

So how did he end up with that cut?

Please ban them. This is a no brainer!!

 

[carolina]

I think I found out how this is possible, sorry if my english is not very good.

They were side by side. Doull on the left of Kittel. They fell to the left (see Doull injuries). If Doull fell and his leg got stuck under his bike and Kittel's bike also fell to the left, it is possible that the discs that are on the left side touched the inner side of Doull's left foot.

 

[King Boonen]

Re:

I think I found out how this is possible, sorry if my english is not very good.

They were side by side. Doull on the left of Kittel. They fell to the left (see Doull injuries). If Doull fell and his leg got stuck under his bike and Kittel's bike also fell to the left, it is possible that the discs that are on the left side touched the inner side of Doull's left foot.

I can't really picture that but even if it could happen, for a disc to actually cut into a shoe like that it would need to be spinning under load. By that a mean either someone pedalling it or the front wheel moving along the road with the rider still upright. Even those soft Fizik shoes aren't going to cut up like that without some serious force an de remember the discs are now rounded. Honestly, I think he caught is foot on a barrier, the bottoms and feet can be very sharp.

 

[carolina]

This image may help a bit:

The left leg of the new zealand girl is under the left side of another girls bike. So, it is definitely possible that the inner side of a left shoe touches the left side of another bike.

Regarding the pedaling/speed thing, they were going really fast and the pedals just needed to hit something to make the wheels spin.

 

[King Boonen]

I can picture the crash, I just can't see how it would happen in a way to cut a shoe like that. It's the inside of his left foot. It mean his foot would have to be parallel with the wheel, not touching the spokes at all as that would stop it spinning and the wheel would still have to have a large force on it. Just going fast or a pedal hitting something isn't enough. Have you ever used a table saw? Or a circular saw? If you start one spinning, turn it off and then push a chunk of wood into it it'll stop pretty quickly. And that's something designed to cut at massive RPMs. A wheel of around 1kg spinning, unloaded has no chance of doing that. If it were the outside of his right foot and he'd managed to get it under the disc while Kittel was upright then maybe it could happen, that's about the only way I can see it and even then I'm doubtful.

 

[carolina]

It's easy to prove/disprove the theory. UCI just needs to take the same shoe, the same disc brakes and make some simulations using a dummy.

 

[SlickMongoose]

Is there an alternative explanation? The fences don't look sharp to me.