hey guys, im wondering 165mm or 170mm, I just came off a sunday which i found the bb pretty low and pedals hitting the ground in spots and really had to time the pedal strokes. So theres a good deal/sale on 170 mm cranks would these be alright on a glory and not as low as my sunday was? I was leaning towards 165mm but since theres only 170mm on sale. whats your guys opinion?