Hi guys, I am busy sorting my old bike to accomodate 9 sp. The kit I have ordered is as follows: Sram x5 shifters 3x9 Sram x9 rear deraileur Sram Pg970 casette, and SRAM PC951 chain... The rear hub is Shimano FHM 475 which, according to the shimano catalogue, can only accomodate 9 speed and not 10 speed, (hence the reason I am sticking to nine) The question is, do I have to buy a different crankset? The current one is a Truvativ crank that came with the bike which was 8speed...