can anyone suggest some good cranks for my black market riot? currently has 170mm, 8 tooth spline eastern ones which i think have come off a night train. i bought the frame new and had the bike shop help me select the parts to go on it, and was a little uneducated on bmx cranks and bottom brackets at the time and kind of let them do the selection. now they're bent and i need new ones, but after looking around, it seems that there's not much of a crank range for that type of spline. is it possible to fit a different bottom bracket with say a 48 tooth spline or something? sorry if this is a stupid question. the shop i bought it from hasn't been very helpful, and you'd all be surprised if i told you that shops name, but i won't. thanks peeps