Re: Disk Brakes vs. V Brakes??

Yes and no.  Depends on the brake type, as well as the setup.  If the
people 
with the tandem have a caliper/rotor disc brake, they'd find improved 
performance by going to a larger rotor.

"treynolds@[EMAIL PROTECTED]
" <thomas.treynolds@[EMAIL PROTECTED]
> wrote in message 
news:1160500179.695916.249960@[EMAIL PROTECTED]
> jim beam wrote:
>> Chris_MdR@[EMAIL PROTECTED]
 wrote:
>> > Hi,
>> >
>> >  - After playing with the brakes for a few minutes, I noticed that
the
>> > discs get noticeably warm, around 170F. Are there ever heating issues
>> > with disc brakes on longer downhill segments? Seems a stupid
question,
>> > but they did get quite warm just by playing around on level ground
for
>> > about ten minutes.
>>
>> they get warm because of the friction - that's what all brakes do.
>> you'll have no problem with heating issues on a disk braked bike - once
>> set up correctly, use with complete confidence.
>>
>
> Regarding the heating issue, I came across a couple on a tandem who had
> a hydraulic disk brake in back, instead of a drag brake.  They said
> that on long downhills the brake heating transfers heat to the fluid,
> the fluid expands and they end up with the brake applied without any
> lever action.  They have to stop and let the fluid cool.
>
> A tandem drag brake and a downhill ATB are not the exact same situation
> but both can expect to sometimes apply the brake for 20-30 minutes on a
> very long downhill.  Does this ever occur on an ATB?
>
> Tom
>
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