Back. To my response in this post about foot slipping on pedals(just. 26), esp at higher pas when power surge from motor. Harder to keep steady cadence.. But also at other times. Would different pedals, or shoes help? I wear comfortable shoes due to foot problem. Especially if I had a bike problem and had to walk. Suspect seat height is also a little low due to knee and weak leg from old car wreck. Also considering different seat and or suspension seat post. My butt can't handle much more than 8 miles at a times, usually less.. so far. Look to improve ride comfort. 98% of my riding is 2 lane highway. 45 mph. No bike lanes. This area not very bike friendly, lots of road bikes ride my road by my house.