First things first: Make sure you're riding with the right pedal on the
right-hand side. If the stickers are wrong, most cranks have an L or R
stamped into them, usually on the inside (facing the wheel). Also you
can test by which way the pedal tightens. R is normal threading, L is
reverse (anti-clockwise to tighten).

Make sure you're getting them on tight. Do you have a decent wrench?
The problem may be that you rode too much with the pedals loose and the
threads are damaged. Further tightening and riding will tell.

Pedals don't unscrew from straight rotation. What makes wrong-side
pedals come loose is *precession*, the spiral motion of the force that
gets applied as the pedaling pressure goes around and around. 100 years
of bicycle technology does not have the pedals on the wrong side; don't
worry!


--
johnfoss

John Foss
Email: "jfoss" at "unicycling.com" -- www.unicycling.com
-----------------------------------------------

"False facts are frequently formed from figures fabricated from fear
fired fiction." -- Harper
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