Variables:
1. Tire. Some tires have a more pointed cross-section than others, and
can be hard to ride in a straight line without constant adjustment.
Compare the tires on the two cycles.
2. Riding surface. Is your surface level? Are you on the side of a
road? Try riding the same line in the opposite direction, or on various
surfaces to rule that out. The side of the road is never flat and
always tilts toward the curb.
3. Cycle build or wheel true. If the wheel is crooked, or dished to
one side, this can put the unicycle out of line. Look down from the top
of the uni. Does everything look straight? Check the rim in relation to
the axle. Is it centered? Now, even if you see something that's not
100% plumb, this may not be the problem. Some unicycles can be totally
out of whack and still ride fine.
4. Seat height/crank length. If these are different between the two
cycles, the problem could be biometric (you). Try different seat
heights, or different crank lengths.
5. Imaginary. Is it all in your mind? Try leaning the opposite way on
purpose for a while. Does this change anything?
Those were listed in rough order of importance/likelihood. Work on them
in that order.
--
johnfoss
John Foss
"jfoss" at "unicycling.com" -- www.unicycling.com
-----------------------------------------------
"The worst thing you can do on a unicycle when you land is stop dead."
-- Kris Holm, world's expert on high-consequence unicycling
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