as of right now i have a 39/16 gearing....i wanted to get a little bit more clearance for grinding and jumping...and also to get more acceleration....BUT...i don't want to be peddling for like ever.....i do mostly street riding....and also i live out in the ''country'' so i do have to get going sometimes...there are alot of hills where i am....you are all probably asking....''how does he live in the country and ride street''////welp i live near a pretty big city so ya...well anyways... i have poverty sealed hubs(flip flop hubs) what is the smallest freewheel that i can put on my bike...13?...well if 13 can...is 30/13 too small? ok...welp i am done asking questions now