does road bike disc brake make sense?
07-19-15, 10:09 PM
#27
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I am coming around.... with feelings of desire for a bike with disc brakes and electronic shifters too.
07-19-15, 10:56 PM
#28
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That is the one complaint that really makes no sense to me. They are extremely easy to setup and adjust. You just loosen the two caliper bolts, squeeze the brake lever, and tighten the two bolts and done. Mechanicals take a bit more but still easier than the fiddly rim brakes I've had to deal with. I never had issues removing and reinstalling my front wheels unless I accidentally squeezed the brake lever while the wheel is out. Even that just means I have to find something to push the pistons back in and everything is fine again. Now if you want to talk about bleeding them then they vary greatly from very easy to a huge PITA depending on brand. Warped rotors and hydraulics are more of a pain to deal with than a bent rim and rim brakes but I've never ran into that issue. Have ran into that issue with rim brakes a lot though.
07-20-15, 07:28 AM
#30
Banned
consumers are free to buy them now.. pro's just as free to not..
the Team manager's choice..
the Team manager's choice..
Last edited by fietsbob; 07-20-15 at 07:46 AM.
07-20-15, 07:28 AM
#31
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Not everyone. On Saturday there were 3 riders, (out of 20) with discs. One was custom steel (Waterford) and the other 2 were high-end carbon. All of these riders were very experienced (Paris-Brest-Paris, Furnace Creek 508, HooDoo 500, etc).
07-20-15, 07:37 AM
#32
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You think the Pro Tour riders buy their own stuff? Disc brkes are coming to a UCI race soon, it's been approved.
The Velonews article I read had interviews with about 10 Pro Tour riders and most of them were at least open to the idea, if not enthusiastic about it.
It's hard for me to understand the staunch retrogrouch stance I read on BF, especially from young people.
The Velonews article I read had interviews with about 10 Pro Tour riders and most of them were at least open to the idea, if not enthusiastic about it.
It's hard for me to understand the staunch retrogrouch stance I read on BF, especially from young people.
07-20-15, 07:47 AM
#33
Banned
I think the mid race wheel changes , for punctures are so much quicker as it is now than the disc brakes allow..
the past CX worlds had US competitors on disc brakes.. there you swap the whole bike, in a fixed location ... Pits ..
(not chasing the race over 100+ miles down the road)
1st Disc bike, rider came in like 10th ..
the past CX worlds had US competitors on disc brakes.. there you swap the whole bike, in a fixed location ... Pits ..
(not chasing the race over 100+ miles down the road)
1st Disc bike, rider came in like 10th ..
Last edited by fietsbob; 07-20-15 at 07:50 AM.
07-20-15, 07:52 AM
#34
I'm doing it wrong.
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Well, right now disc brakes are heavier, less aero, and cost a bit more to have on a bike (plus they like to make noise, IMHO). All this can be overcome through engineering so the future may bring some really fine equipment.
I'm not descending mountains or really ever ride in the rain so a disc brake equipped bike is just not needed...for me. If I was doing those things on the regular, I would be looking into a disc brake set up.
Personally, I'd rather have electronic shifting than disc brakes right now.
I'm not descending mountains or really ever ride in the rain so a disc brake equipped bike is just not needed...for me. If I was doing those things on the regular, I would be looking into a disc brake set up.
Personally, I'd rather have electronic shifting than disc brakes right now.
07-20-15, 10:05 AM
#35
wears long socks
How does this affect the front wheel?
Disc brakes are stopping you through the spokes, where rim brakes are not.
Rear wheels are designed to transmit this kind of power through the cassette, but are disc front wheels designed to absorb all of this force?
Disc brakes are stopping you through the spokes, where rim brakes are not.
Rear wheels are designed to transmit this kind of power through the cassette, but are disc front wheels designed to absorb all of this force?
07-20-15, 10:57 AM
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Pretty sure this question has been asked and answered by all of the major bike and wheel manufacturers.
07-20-15, 02:06 PM
#37
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07-20-15, 02:06 PM
#38
wears long socks
The trend seems to be a 24 spoke front with a disc, (typical rear wheel lacing).
I would bet that a 200 lb rider on a hot descent could twist the spokes pretty easily. I don't think just sticking a 24 spoke on the front is enough.
07-20-15, 02:16 PM
#39
Banned
I'll just wait till the Professional teams all make their own choices .
and Mavic Neutral support carries more than 4 different kinds of wheels on their Yellow cars..
but I wont stand between you and the cash register when you are spending your own money..
and Mavic Neutral support carries more than 4 different kinds of wheels on their Yellow cars..
but I wont stand between you and the cash register when you are spending your own money..
07-20-15, 04:05 PM
#40
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We survived for a couple hundred thousand years without any bikes at all. There will be forward progress in all areas. Not valid argument.
07-20-15, 04:51 PM
#41
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They add more spokes and lace them 2x or more. Rim brakes do stop through the spokes, but it is a pulling on the hindmost spokes parallel to the ground, not a torquing action. That's why you can have radial laced front wheels with rim brakes.
07-20-15, 04:55 PM
#42
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What about for riding gaps? Good reliable brakes in all weather are important when descending. Seems like disc brakes would make sense.
07-20-15, 05:00 PM
#43
Senior Member
I've decided they make sense for some people not others:
If you ride in fair weather and don't want carbon rims, then you don't need disc brakes. Bad weather and/or carbon rims, and you probably want discs.
If you ride in fair weather and don't want carbon rims, then you don't need disc brakes. Bad weather and/or carbon rims, and you probably want discs.
07-20-15, 05:11 PM
#44
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I wouldn't bank on that. Stopping the momentum of a heavier rider will tax the front wheel more than someone hammering the pedals.
The trend seems to be a 24 spoke front with a disc, (typical rear wheel lacing).
I would bet that a 200 lb rider on a hot descent could twist the spokes pretty easily. I don't think just sticking a 24 spoke on the front is enough.
The trend seems to be a 24 spoke front with a disc, (typical rear wheel lacing).
I would bet that a 200 lb rider on a hot descent could twist the spokes pretty easily. I don't think just sticking a 24 spoke on the front is enough.
Yeah, your probably the only one to think of that. I doubt Mavic, Shimano, Enve, Reynolds, Stans, HED, DT Swiss, etc... EVER consider the loads involved when they build wheels and put them on the market.
The reality is, it doesn't really matter if the rim is decelerating the hub (rim brake) or the hub is decelerating the rim (disc brake), the force is exactly the same just in the opposite direction. And either way, the maximum force is limited by the amount of traction your tire has on road, which, by design, is well below the force required to break all the spokes. Your front wheel is going to wash out or your going over the bars before the spokes break.
I'd be more worried about that cherry red disc slicing through your carotid artery when you crash.
07-20-15, 05:18 PM
#45
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my bigger question is, of the folks taking this seriously, how many of you are retired???
07-21-15, 07:21 AM
#47
wears long socks
Yeah, your probably the only one to think of that. I doubt Mavic, Shimano, Enve, Reynolds, Stans, HED, DT Swiss, etc... EVER consider the loads involved when they build wheels and put them on the market.
The reality is, it doesn't really matter if the rim is decelerating the hub (rim brake) or the hub is decelerating the rim (disc brake), the force is exactly the same just in the opposite direction. And either way, the maximum force is limited by the amount of traction your tire has on road, which, by design, is well below the force required to break all the spokes. Your front wheel is going to wash out or your going over the bars before the spokes break.
I'd be more worried about that cherry red disc slicing through your carotid artery when you crash.
The reality is, it doesn't really matter if the rim is decelerating the hub (rim brake) or the hub is decelerating the rim (disc brake), the force is exactly the same just in the opposite direction. And either way, the maximum force is limited by the amount of traction your tire has on road, which, by design, is well below the force required to break all the spokes. Your front wheel is going to wash out or your going over the bars before the spokes break.
I'd be more worried about that cherry red disc slicing through your carotid artery when you crash.
Trek thought a lot abot disc brakes, then their disc bike skewer design paralyzed someone..
07-21-15, 08:02 AM
#48
I'm doing it wrong.
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