Originally Posted by
adamskiboy
so knowing the bb drop is there a way of working out the bb height by working out the diameter of the whell and subtracting the drop from it?
Yeah, assuming you're on 700c's, your BB height would be the radius of your wheel minus the BB drop.
622mm - 55mm = 567mm (without a tire)
assuming you use tires on your bikes, it will be higher.