CR400 - this may be a really dumb question, so forgive me, but do you have your saddle too low and are you mashing in too high a gear?
The things you describe sound like a saddle too close to the cranks and pushing too large a gear to me. (bike feels too small sometimes, bike feels too big sometimes, pulling power from the bars, wheels unweighting, butt coming off the saddle in different situations)
It might be something really subtle, like just a half inch or so, or one gear or so, but with the power you're putting into the bike it might make a big difference.
Or I could be completely off base! Just a thought...
Knot-who-rarely-goes-over-20-mph
Last edited by KnottedYet; 04-15-2007 at 01:56 PM.
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson