si lenivý si to pohľadať na shimano webe
Model Number FC-M660
Series SLX
Crank Construction HOLLOWTECH II
Cassette Compatibility 9-speed
Chain Compatibility Super Narrow HG for 9-speed
4-Arm Chainrings yes
Cahainring Sizes 44-32-22T/48-36-26T
Bolt Circle Diameter 104/64mm
Crank Arm Length 170/175mm
Crank Arms forged aluminum / hollow typeOuter Chainring aluminum
Middle Chainring steel + composite (32T), aluminum (36T)
Inner Chainring steel
Chainring Bolts & Nuts aluminum (bolt), steel (nut)
Chain Guard option
Chaincase Compatible no
Bottom Bracket included
E-type FD Compatible yes (44T)
Chain Line 50mm
BB Shell Width 68/73mm
Average Weight 889g including BB (44T)