's Forum Archives - General

Archive Home >> General(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 )

Disc brake stress vs. sprinting/ accellerating stress?(5 posts)

Disc brake stress vs. sprinting/ accellerating stress?timfire
Feb 22, 2003 6:39 PM
Sorry to open this "discussion" again, but I've recently been reading some of the old threads on disc-brakes. I noticed that while many people brought up that rims/forks/hubs would have to be made beefier to accommidate the added stress of a disc brake, noone (that I read, at least) discussed the stress that a rear wheel is subjected to under heavy sprinting/accellerating.

I sprint HARD, often from a (near) stop (urban traffic is good for that). I also think about track racers. Or messengers who ride without brakes and skid their bikes to a stop. I'm sure that that kind of accelleration must put alot of stress on the rear hub.

So how would the stress of a disc brake be much different? Traditional hubs/frame/rims seem to hold up fine. It seems to me that many people are exaggerating their case against disc-brakes.

Anyway, I know this all sounds more like a statement than a question, but I would like to know if anyone has real facts/data on the stress that rear hubs endure during the previously mentioned conditions versus what they would endure with disc brakes.


--Tim Kleinert
re: yes they will be much differentcyclopathic
Feb 23, 2003 12:11 AM
forces applied in a different way so rims/forks/frames need to accommodate it. Second disc rotors heat up and it should affect bearing life.

Don't take me wrong all disc related issues can be easily addressed except one: there's no real need for disc brakes on road bikes.
re: yes they will be much differentHENRY K
Feb 23, 2003 6:45 PM
How about on Cyclocross bikes?
Well, they sure are nice in the mud...Matno
Feb 23, 2003 7:15 PM
Otherwise, I can't think of a single reason unless you can get discs that weigh less than canti's...
I've seen crosser built with discscyclopathic
Feb 24, 2003 7:46 AM
that would be Avid mechanicals. Diamond back even had a production model a couple years back, remember?

Hydro are harder to do Magura makes road levers but they only for their rim brakes. And you'd have to go to barend or downtube shiters.

There're Xross forks with disk mounts compromise would be to put hydraulic disc upfront and use one chainring. Of cause new XTR shifters can be used on drop bars. Also tandems have a gismo to convert cable to hydraulic line if you get 2 you can use hydraulic brakes with STI shifters.

In terms of usability yeah you gain weight but not much ~1/2lbs and in exchange you'd have consistent braking in mud, wet or freezing - small price to pay. If you use cross bike alot it may end up being cheaper then replace rims. Ice built up destroys pads/rims in no time.

But since most Xsers also own MTB and road bike the idea never took off.