Most of your questions can be answered in this recent short thread of mine. I would go to a 2-bolt quality seatpost, not a single bold or cheap. If you are careful, the less expensive ones recommended by some of the folks on this thread will work - but you have to be careful they stay tight. I
did stay with the same brand of seatpost that stripped because it was a zero-dollar swap at my LBS (REI)
and because I understand how the ridges stripped out. Now when I adjust, I check after about 100 feet for tightness, (yep, loosened a little) then after 1/4 mile, (very little) then a mile... and after about 5 miles.
http://www.bikeforums.net/showthread...-declining-ugh
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Last edited by RoadTire; 08-31-12 at 05:31 PM.