I just got a set of Mavic Crossrides (well, ordered ... they're in the mail). I need a 7-speed cassette to go on them.<BR><BR>The wheels are these. Any suggestions for 7-speed gizmos to fit them? I ...

BBR Tuning 2.4L frame Accrue rims with street tires PK-80 balanced slant head engine with speed carb SBP HD Jackshaft with Shimano 7-speed cassette and derailleur Dual disc brakes Suntour locking ...

the other day at the bike shop as i was shopping for a new saddle bag and a better lock , the shopkeeper appraoched me and asked if i wanted to upgrade my 7 speed rear casette on my MTB to a 9 speed.