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  • nycebo

    If chamfered edges makes riders think that rotors are safer than spokes or chainrings, then so be it. Just happy to have rotors back in the mix. Mark my words…they will be prolific by 2020.

    • Sean Doyle

      They will be prolific in 2018!!! You won’t be able to buy a road bike, except for the low end budget bikes sub $1000, without discs by 2020!

      • SecretPro

        Yep they may be prolific in 2018, but not on pro bikes, we don’t need them. There are very few times that a disc brake will improve the braking in road races, as you may or may not have noticed, we don’t like to use them, except of course in the wet.
        You might want to ponder why the bicycle industry is pushing for this…

        • Sean Doyle

          I know why the bicycle industry wants to push it. Despite better braking in all conditions, the ability to keep running with a buckled wheel, the absence of heat issues and carbon rims and the fact the rims won’t wear out from hard rubber blocks rubbing against them, the industry just wants to sell stuff so it can keep making money. Shame on them for responding to a market that keeps demanding new a better gear each year then gets ridiculed for providing the new a better gear. You as a pro, though it may be a secret from even the pros!, would know that you will get told to ride what they supply whether you like it or not. If the sponsor says jump, sorry dude but you better jump…..but you’d know that already. ?

        • Wily_Quixote

          The idea of pros riding on discs is to make the technology accessible to the other 99.99999% of performance riders in the world.

          Manufacturers will not progress to manufacturing racing bicycles for the masses without the UCI sanctioning disc brakes and without pros riding on them – as many riders, racing or not, only ride what the pros use.

          Yes, this benefits manufacturers because they sell more swag, but it benefits punters like me who want one bike to train and race on – preferably a carbon rimmed bike that stops well in the rain.

          Punters can’t often afford or store a training bike, a commuting bike and a racing bike. One bike to rule them all with fast carbon wheels and discs is what many punters could well use but won’t get unless pros are forced to ride them.

        • ebbe

          Exactly the same thing was said about helmets. Hell, “pros” (secret or not) even held sit down protests (delaying the start by 4 minutes) to prevent helmets being made mandatory by UCI. Helmets were “heavy”, they “cooked the heads of riders”, they “caused heat strokes”, they “prevented proper breathing”, they’d “make riders take bigger risks”, and best of all “weren’t needed” because “we’ve done fine without them”. Any of these arguments sound familiar?

          “Pros” managed to push helmet regulations forward for 13 years, and somebody finally had to die for helmet regulations to be decided (Mind you, the discussion was still not over! But at least a decision had been made). Now, you tell me you’d even consider starting a a race without a helmet on.

          The disc brake discussion will also continue for quite a while. Even when a final decision is made, the discussion will continue. But whatever discussion the old garde wants to remain stuck in, in about 10 years from now, the generation that comes after you will not even consider showing up to a race with these dangerous* outdated rim brakes.

          * carbon delamination from heat induced into the rim, tubular glue melting form heat induced into the rim, slowly grinding down rims (talk about industry money-making), easy misalignment, fingers getting caught in spokes when adjusting the calipers while riding (ask Fabio Felline how it feels to get caught in spokes while riding), the Specialized Venge Vias debacle (rim brake version only, what a surprise), unpredictable braking in foul conditions, flex in calipers, wheels locking up too easy because of the larger radius of the brake track, buckled wheels jamming, leaves and musettes and plastic bags getting caught, etc. Here’s an example of the dangers of heat induced into the rim, causing the tubular glue to melt and the tire to come undone in a high speed descent:


          And of course everybody remembers this one:


          The bicycle industry is pushing for this, that’s no big secret. As they should! Yes, they do this partially because it makes them money. So do helmets (as we know, “pros” don’t even want helmets!), carbon frames and wheels (who really needs those? Steel is real man!), power meters (Eddy Merckx didn’t need one, why would you?), reflective clothing (streets are closed for races anyway, and it’s always in daylight, so why would you need to stand out in traffic?), etc etc. Oh, one other thing all of these have in common, next to making the industry money: They all offer real world benefits for their customers, who then can decide to buy it (or not – it’s s free market). And unless you ride for a team which is not sponsored by any bike/kit/parts brand at all (although I struggle to see which team that could be), that pays part of your salary.

          Road racing seems to be the only discipline not adopting disc brakes (yet). Ok, next to track, but of course they have no brakes at all. If that remains, and if I were a big bike brand, I’d start looking into shifting some of my marketing budget to the disciplines that allow me to showcase my top – disc brake equipped – models, such as cyclocross (noticed how Trek’s getting into that market more and more?), MBT, and even build the gravel market. That might leave less money for Road.

          • velocite

            I remember when seat belts were made mandatory in motor racing some drivers objected. Stirling Moss claimed that they were dangerous because in a crash you couldn’t be thrown clear so were at risk of burning to death!

  • Callum Dwyer

    This question may have been answered before, but why has road disc brakes only starting to appearing in the last few years? Disc brake technology has been use on MTBs what 15 years on now?

    • Sean Doyle


  • King

    I believe this will be massively safer. Those who think disc brakes are only a road problem are mistaken. I lacerated my calf with a 7 inch gash at Jingle Cross three weeks ago due to my own bike in a crash and spent a week in the hospital due to the ensuing infection. I am still on crutches with a wound vac and have yet to make it back to the office. There are more important things in life for amateur racers than and will not be back on a bike with disc brakes until a rounded rotor is available to me.

    • SecretPro

      Of course it’s safer; for those fatties who descend the mountains of France, on there 6.5kg framesets, with lightweight wheels, and don’t have the experience built up since kids to descend without riding the brakes.

      • glenny oc

        Or perhaps people just like them for less maintenance, all weather braking and wheel longevity. Rims brakes are a pita loved it when I went disc on mtb and now on road. Callipers are fine just a hassle for me.

    • ebbe

      I think TRP already sell rounded rotors, IIRC. I’m not sure how rounded they are exactly, but maybe you could look into these?

      Good luck with healing from the injury!

      • James Huang

        Yes, they do, as do SwissStop.

      • glenny oc

        So do tektro

        • ebbe

          TRP = Tektro ;-)

    • glenny oc

      Round rotors chamfered are available I run them now. Very soon rotors will have carbon shielding for aero reasons and finger protection. Some guys have done their own prototypes.my bladed spokes can do more damage to my fingers or face yet they aren’t banned. Cars and motorcycles do more pain to competitive cyclists.

  • velocite

    Since no evaluation criteria have been mentioned I assume there are none. So how will the UCI know whether the ‘trial’ is successful? Is there some number of injuries due to burns from discs, cuts from discs or accidents due to some riders with more stopping power than others? Of course not. I agree with Sean Doyle below: discs are unstoppable (!) and the UCI’s approach only maximizes the confusion and uncertainty of their introduction into the pro ranks.

    • ebbe

      Yeah, that “mixed field” keeps surprising me. It makes no sense at all. Why not just tell the representatives of the sporting goods industry: “Look guys, you want trials. OK, we’ll allow trials in 2017 at Paris Roubaix, Tro Bro Leon, Arctic Tour of Norway (just to name a few as examples), provided you make sure all teams have disc brake bikes and all riders have had time to get used to them. If you can’t make that happen between your members, no trials.”

  • glenny oc

    The one berating discs are the guys who’ve house shelled out serious coin and about to see their bike become basically undesirable. I lost big time when disc came out in mtb, just bought an expensive callipers mtb and then disc came on like a tornado. I wore it bar but that’s the price we pay at times.


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