the amount of rise you've given us choices on isn't big enough (you'd be better going up in 10s). theres pro's + cons to high and low bbs (this is more of a stock issue high bb mods are just awesome , low bb just doesn't feel right) high bb: good: more clearance feels stable on the back wheel makes front wheel moves easier (the bb rise pushes your weight forward more etc) bad: b*****d to manual and bunnyhop can feel awkward (due to raised centre of gravity) AliC won't love you as much i never feel i can get any power behind a high bb (i find it wierd to explain, but you can't get "behind" the bike when gapping, maybe thats just me) Low bb: good: good for manuals+bunnyhops AliC is likely to love you more feels more stable when your not on back wheel (like for rolling moves etc) Bad: less clearance all i can think of really, these are just my opinions/views i may be wrong/plainly retarded + have the wrong idea 'cause i ride a mod low bb ***