RE: [ST] RE: Brett - been there

[david.funk@xxxxxxxxxxx]

I disagree with the statement
   "it's best to start braking gently, then building up pressure gradually to ..."

Since when you first apply the brakes you are at max speed (duh)
So every msec is costing you lots of distance.
Getting hard on the brakes quickly will greatly reduce your total distance.
Some concideration must be given to initial weight transfer. When the fork is fully compressed the front tire will have more traction, so can take more brake.

About locking up being easier at slow speed:
  In addition to what was said, the rotational energy of the wheel is a function of rotation speed squared. So at high speed the wheel has a lot of energy that will prevent the wheel from stopping.


David W. Funk
'00 Sprint ST
Pleasanton, CA


> >From: jrice
> >To Mick: I wonder if others have had similar experiences because I've locked 
> >3 times and the last one right sided and fractured my ankle x 3.
> >I'm wondering if I can readjust them so they're less sensitive or something. 
> >Any thoughts out there besides the obvious.
> 
> The Sprint brakes are actually less sensitive, in the first part of
> pressure at least. Of what I've read it seems that they did that on
> purpose to make the brakes a bit friendlier. I guess practice, practice,
> practice would be the obvious answer. I also assume you locked up the
> front, not the rear? In contrast to ABS, it's best to start braking
> gently, then building up pressure gradually to try to keep feel with
> the brakes (also obvious I guess). It's also important (and probably
> obvious to you as well) to use mainly the front brake, not the rear.
> If that doesn't help I would guess an ABS Sprint is in order to prevent
> killing yourself ;-).
> 
> Also be aware that the chance of skidding / locking up increases when
> speed decreases. That's because the actual speed difference between
> brake disc (wheel) and brake pad becomes smaller, so the slower it goes,
> the less energy it would need to lock it up. So when you approach standstill
> it's best to decrease brake pressure again to prevent this "slow speed
> lockup". Some reference material:
> http://www.msgroup.org/TIP030.html
> http://www.msgroup.org/TIP064.html
> Not everything on that site is entirely correct, but most is
> very usefull and at least food for thought.
> 
> In what kind of situations did you lock it up?
> 
> Emile
> www.piloot.com
> 
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