Hi guys, would need help to guide me on how to measure BB height.. i am still having the old Crescent Illions frame. i dont remember any specification stating the BB height of the bike.. But assuming the way you measure the bike example measuring the chainstay length, would be middle of rear shaft to middle of bb. that would be your chainstay length. i was using this method to measure my bb height.. taking measurement from middle of rear wheel shaft to ground and than taking middle of bb to ground.. and subtracting it and that would be the bb height.. My question now would be if i change any of my tyres (especially the front) to a higher sidewall type, the measurement would be different i believe.. Any advise on this?? and from my knowledge is that different BB height uses different length and rise of stem. really need help to readjust my bike handling and geometry. Thanks in advance. Regards, Kel