If your Schwinn is old enough to have cottered cranks, you don't want to
beat on it too much. Those cranks will probably come loose
chronically.
A later Schwinn with cotterless cranks will be better, but still has the
weaknesses below.
If your Schwinn is new (prox. 1997 or later), I don't think it has the
same level of indestructability in its frame than the older ones.
The old frames could take quite a bit of punishment, but suffer from two
major flaws:
1. One bolt holds the whole thing together. Seat adjustments are limited
to 1" increments, which would be considered ludicrious to any
bicyclist.
2. The stamped steel frame is not only heavy, it is also flexy. Do not
put in a tire with less than 1/4" clearance on each side. Even with that
much, the tire will rub the frame when you pedal hard. Pedaling hard is
what happens when you ride either uphill or downhill. Believe me, I know
this from experience with my own Schwinns.
My recommendation is to keep the Schwinn for easier types of riding, and
get a MUni for the trails.
--
johnfoss - More Moab Fun
John Foss, the Uni-Cyclone
"jfoss" at "unicycling.com" -- www.unicycling.com
"Read the rules!" -- 'IUF Rulebook'
(http://www.unicycling.org/iuf/rulebook/) -- 'USA Rulebook'
(http://www.unicycling.org/usa/competition/)
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