i don't mean to hijack this thread, but i have a question that seems related to the topic. i just bought a new bike and switched from wider multi-terrain tires to a thinner paved-use (specialized armadillo) tire. the new tires are much harder and less forgiving. i ride on paved trails for the most part, and have been noticing some lower back pain in the 1st week of riding. my question (or questions) is, should i replace the old gel seat (3 years 6K miles), consider a suspension seat post, or just try and get "used to" the rougher ride?! by the way, i have already reduced the tire pressure to the recommended minimum (50 PSI) and noticed a bit of relief. thanks for the advice and suggestions.