So far no one has addressed the location of the "take off" point... the
rule of thumb that I use is that you should measure the approximate
height (you can just eyeball it) of the obstacle you want to jump onto
and take off that same distance from the obstacle...
So if you want to jump onto a 30" high ledge, take off 30" from the
base of the ledge. Take off a little earlier if you're looking to jump
over an obstacle instead of jumping onto it.
I agree that riding backwards from the take off point is the best way
to measure. Not only does it account for the compression of the tire,
it also accounts for any wobbliness in your approach to the takeoff
('cause not everyone rides in a straight line).... not to mention it's
good practice for riding backwards!
You only need to go back from the take off point enough to come up to
speed for your hop. 10 revolutions, as James suggested, is twice as
long as what I need. Remember that speed is just as important as body
tuck in a rolling hop.
--
maestro8
Those are my principles. If you don't like those, I have others. --
Groucho Marx
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