ditto on the attempts to make a cheap folder into a slightly more expensive cheap folder... i started a summer project to take a walmart folder, and replaced the crankset with a 54T gear to get a better high end, changed the vbrakes with a better grouping, swapped out the seat, replaced the handlebar with a better rise. in all, it felt a bit nicer to ride and had better gearing, but it still creaked and groaned like a sonofa***** just from the poor tolerance of parts. i tightened and realigned everything multiple times, and the bottom line is - it's still just a cheap folder - with some expensive parts.