Already won a sprint stage.

Twice :)

I would ask question "why anyone would need disc brakes where no braking is required" (sprinters' stages)?
Are we re-opening can of warms?

my guess is cost and uniformity at least for the time being. It's a ton of money to switch every bike to discs and every wheel. Especially when some people have 2-3 on the smaller teams. If you're not getting disc wheels and frames for free that's gonna be some major cash to outfit a whole team with backups.

because not every team has chosen to use them during the UCI test period.

Once the UCI clears them for use, more than likely every team will have them

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I can change a wheel on my QR bike much quicker than on my disc brake/thru axle bike. If I'm nervous/rushing, it's even worse.

If it takes an extra 5-10 seconds to change a wheel, that equates to a few extra minutes of chasing, or maybe never making it back on if it flatted at a critical point in the race.

I think that Mavic/Enve are on the right track with a hybrid-designed "speed release" thru axle. However, it's really not the axle that makes the wheel change slower for me. It's usually getting the chain aligned with the cassette while simultaneously aligning the rotor into the caliper.

To me, I see this as a bigger downside than the benefit that discs provide. If i was on a pro tour squad, i think i would opt for rim brakes in 98% of races. The last 2% would be a course with lots of wet descending. Then again, wet roads also increase your probability of a flat tire, so maybe the benefits aren't worth the risk even in that scenario.

From listening to LA's podcast, he seems to think that the changeover is inevitable. The biggest hiccup is the safety of riding discs in a peloton - they get hot and can act like a slicer in a crash.

The solution so far might be rounded edges and disc covers. However, that could limit cooling of the rotor. It will be interesting to see what the UCI does but they will more than likely approve it.

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i got my rear wheel up to speed on my workstand and dropped an apple on my disc rotor, just to see what would happen. The rotor doesn't feel sharp at all when the wheel isn't moving, but the apple got annihilated.

Well that test doesn't take into account a body moving at 25 mph and slamming into a rotor

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Not super scientific, but makes a good point- Jeremy Powers



https://www.instagram.com/p/BVPozG5FR2e/

Same test, same result. Still doesn't accurately test a human body hitting a rotor at 25-30 mph.

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I might be missing it, but I am pretty sure that is a different result from an annihilated apple. Just shows that the discs with rounded edges are better then the standard design. Not that it is the answer to all of the questions, just a better option.

I'll agree with that. Rounded edges are better.

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