on 6/29/09 2:56 AM, GeorgeS at [email protected] wrote:

> 
> Last week I posted a question about tires for gravel.  Thanks for the
> response.  I've gone with the consensus and ordered a pair of Pasela's
> w/o TG.
> Since then, I've had two kind of scary falls, both in exactly the same
> situation - fast descent on dirt/gravel road with sweeping right turn
> at the bottom.  In both cases there was loose stuff in the turn and my
> rear wheel just slid out and I was down.  Got some road burn but no
> real damage other than to my dignity.  Is it possible this is the
> result of having the wrong tires, or (what seems more likely) I just
> don't know how to handle this situation.  I don't like the idea of
> just riding the brake every time I start going down - takes some of
> the fun out of it.

Gravel can be pretty tricky.  Here are a few thoughts which may (or may not)
help. (Disclaimer - I've logged a few hours on mtb's and trails, spent more
than a few hours cleaning up wounds and spent a goodly amount of time
pondering what I did wrong while lying in a dusty, sweaty heap on the
trailside.)

My elbow/trail interface sessions usually happen when I've been riding a lot
of good, grippy pavement and then get onto a dry, loose trail.  I brake too
hard, at the wrong time and expect more adhesion out of my tires.

Relaxation will cure a lot of evils. Your bike basically wants to stay
upright and your mass is moving forward, so if you can keep loose and get
the bike back under you, chances are you'll come out of it OK.  There are
countless times when I've seen riders just barely start to break the rear
wheel loose when they either go rigid or just figure it's all over.  End
result is a cloud of dust and dermal abrasion. If you find some of the
classic Repack footage, you can see good examples of bikes getting way
sideways under riders. Granted, there may have been "relaxation assistance"
but the riding skills are significant.

http://sonic.net/~ckelly/Seekay/mtbwelcome.htm
http://www.klunkerz.com/

You'll need some technique. It's important to know when you'll lose
adhesion.  I'll stab the rear brake a bit when I'm under control to see what
I can get away with on a given trail. Remember, as soon as you start
skidding, you're accellerating. You are better off scrubbing speed before
you need to. I'd probably play a little with both front and rear skidding
conditions so that you get used to it and don't think that the game's over
just because your tire isn't locked onto the road surface.

Look where you want to go.  As soon as you look at the ground, you'll go
down.

If you opt for the "tripod" approach, get your foot ahead of you, punch the
ground hard and get it back on the pedal quickly.

If you went down without touching the brakes, then you went in with too much
speed for your conditions and abilities. If you tapped the brakes and found
yourself looking at the sky, you braked too hard and didn't keep the bike
under you.

There should be little, if any weight on your saddle whilst engaging in
loose condition descending.
 
hope that helps!

- Jim

-- 
Jim Edgar
[email protected]

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"That which is overdesigned, too highly specific, anticipates outcome; the
anticipation of outcome guarantees, if not failure, the absence of grace."

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