Clutch-set 2pcs Aluminum / 2pcs carbonRelated items Clutchshoe Aluminum (4) (#600175) Clutch Bell 17T (#600220) Clutch Shoe Carbon (4) (#600228) Clutch Spring smooth 0.85mm (4) (#600229) Clutch Spring moderate 0.9mm (4) (#600230) Clutch Spring tough 0.95mm(4) (#600231) Clutch Spring X tricky 1mm(4) (#600232) Clutch Spring set (4x4) (#600233)