Another pro disc brake crash

[ergott]

Originally Posted by colker

So ... what is your objection to discs on the peloton? MIne is about to be clear on the following weeks, on the classics where flats happen, wheels are changed and of course: crashes all over the place.

Mainly no improvement over current rim brake tech. Pros mostly ride in great weather and have their bikes meticulously maintained. A rim brake bike (even with carbon rims) brakes every bit as good in fair weather. You're adding weight and complexity to a system that doesn't need it.

In the wet, I could see them preferring discs especially on hilly or mountainous terrain. However, the percentage of road races that are in dry conditions is much higher.

Advantages of disc are:
Using carbon rims (especially clinchers) on more varied terrain on public roads where you might end up needing to constantly scrub speed.

Wet conditions as disc keep the rims cleaner (nice when changing flats) and work better.

Lower maintenance. Sorry if people disagree, but I use an maintain my stuff a lot. The bike I've done the least amount of work on is my Endpoint with Di2 and hydraulic brakes. The only maintenance I've done since I purchased the bike was I replaced the pads. That's it. Bleeding brakes isn't a regular requirement at all if you set them up right for the get go. Same bike has carbon rims and I don't have to touch the wheels. I even took them on D2R2 with 0 concern for braking on some hairy descents.

It's possible to run more than one wheel diameter. I have a 700X25mm when I'm only riding roads around me and I have 650X40ish for heading off the asphalt.

Discs are also an advantage over long reach calipers or similar brakes that try to gain clearance over large tires. The discs don't care how wide your tires are.

[colker]

Originally Posted by ergott

Mainly no improvement over current rim brake tech. Pros mostly ride in great weather and have their bikes meticulously maintained. A rim brake bike (even with carbon rims) brakes every bit as good in fair weather. You're adding weight and complexity to a system that doesn't need it.

In the wet, I could see them preferring discs especially on hilly or mountainous terrain. However, the percentage of road races that are in dry conditions is much higher.

Advantages of disc are:
Using carbon rims (especially clinchers) on more varied terrain on public roads where you might end up needing to constantly scrub speed.

Wet conditions as disc keep the rims cleaner (nice when changing flats) and work better.

Lower maintenance. Sorry if people disagree, but I use an maintain my stuff a lot. The bike I've done the least amount of work on is my Endpoint with Di2 and hydraulic brakes. The only maintenance I've done since I purchased the bike was I replaced the pads. That's it. Bleeding brakes isn't a regular requirement at all if you set them up right for the get go. Same bike has carbon rims and I don't have to touch the wheels. I even took them on D2R2 with 0 concern for braking on some hairy descents.

It's possible to run more than one wheel diameter. I have a 700X25mm when I'm only riding roads around me and I have 650X40ish for heading off the asphalt.

Discs are also an advantage over long reach calipers or similar brakes that try to gain clearance over large tires. The discs don't care how wide your tires are.

MOstly agree except for 2 cases: 1- some races can happen under a blizzard and those races can involve long descents. Discs could work there.
2_ Even on public roads where you have to break often, rim brakes are effective. Even when it is raining and raining hard, i don´t feel i need more brakes unless i had to ride down a mountain and in that case, discs or not, it would be dangerous.

I checked the endpoint on line.. how did you put Di2 to work on that frame?

[ergott]

The Di2 is externally wired and the battery is under the down tube by the BB.

[oldpotatoe]

More today-

http://www.cyclingnews.com/news/disc...en-says-hansen

[mcteague]

I really don't understand all the consternation over disk brakes. I am satisfied with rim brakes but can see the benefit in adverse conditions. But, considering all the potential risks in racing, disk rotors would be FAR down the list I would think. However, logic rarely seems to be applied. In this recent case, there clearly appear to be rust marks on either side of the shoe cut. Pretty sure new disk rotors would not do that. My guess is some roadside barrier caused the cut.

As for the argument that mixing rim and disk brakes in the peloton would have too much variation in braking ability, I beg to differ. What about when aluminum and carbon rims are mixed? They don't exhibit the same braking performance, especially in the wet.

Maybe old spud is correct and this is just a proxy for riders feeling ignored on many issues.

Tim

[Black Dog]

Originally Posted by mcteague

I really don't understand all the consternation over disk brakes. I am satisfied with rim brakes but can see the benefit in adverse conditions. But, considering all the potential risks in racing, disk rotors would be FAR down the list I would think. However, logic rarely seems to be applied. In this recent case, there clearly appear to be rust marks on either side of the shoe cut. Pretty sure new disk rotors would not do that. My guess is some roadside barrier caused the cut.

As for the argument that mixing rim and disk brakes in the peloton would have too much variation in braking ability, I beg to differ. What about when aluminum and carbon rims are mixed? They don't exhibit the same braking performance, especially in the wet.

Maybe old spud is correct and this is just a proxy for riders feeling ignored on many issues.

Tim

I agree that it may not have been caused by the rotor but the rust colour is likely dried blood from the cut in his foot.

[FlashUNC]

Originally Posted by Black Dog

I agree that it may not have been caused by the rotor but the rust colour is likely dried blood from the cut in his foot.

He bled through the shoe? Ye Gods man, he should be posting photos of that wound instead.

[ColonelJLloyd]

Looked like rust to me.

[Mike V]

I'm not a fan of discs on road bikes but......

Skip to 5:00
https://m.facebook.com/story.php?sto...93601667403827

[mcteague]

Originally Posted by Black Dog

I agree that it may not have been caused by the rotor but the rust colour is likely dried blood from the cut in his foot.

No, not blood.





Tim

[ColonelJLloyd]

Originally Posted by Mike V

I'm not a fan of discs on road bikes but......

Skip to 5:00
https://m.facebook.com/story.php?sto...93601667403827

You just got yourself kicked out of the gaggle, buddy.

[Black Dog]

Originally Posted by mcteague

No, not blood.





Tim

I agree, looking at the pic of the cuts on his makes it seem unlikely that it is dried blood on the shoe. I did not see the pic of his foot. Thanks.

[oldpotatoe]

Originally Posted by Mike V

I'm not a fan of discs on road bikes but......

Skip to 5:00
https://m.facebook.com/story.php?sto...93601667403827

The guy ought to be fired for clamping that frame on a top tube.

[Cicli]

Originally Posted by oldpotatoe

The guy ought to be fired for clamping that frame on a top tube.

Yep,
I dont understand why people do that.

[ColonelJLloyd]

Originally Posted by Cicli

Yep,
I dont understand why people do that.

1. Weight distribution.
2. Not enough seat post.
3. Fragile stickers/decals on the seat tube.
4. Steel frame doesn't GAF aka because you can.

Sure, there is potential for damage. There's also the very real possibility that no kittens will die and the world will not end.