Hey everyone, I have two bikes currently...that my g/f and I ride, and we were hoping to somehow improve the ride quality/smoothness/speed with little to no monetary investment. When I refer to any improvement of the bike...I am thinking of anything regarding general maintenance (tightening, lubricating, degreasing, adjusting) of the bicycle and its parts. Currently, the two bikes are correctly fitted for sitting height (one is a mountain bike and the other is a "hybrid"), both have brakes in good working order, shifting that seems to be in good working order (could be tuned? adjusted? etc?), both are going to have new slicks and tubes, no rust, good condition shifters and shifter grips, etc. Can anyone give me an idea of where to look in regard to certain parts of the bike, in order to improve ride quality without purchasing new expensive parts ($50 limit per bike)? Btw, I regularly hand wash both bikes and make sure the tires are filled to correct psi, but I have been looking into some maintenance for the drive train (lubricants, degreasers, etc). Thanks everyone