Model Number FC-M770
Series DEORE XT
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
Bolt Circle Diameter 104/64mm
Crank Arm Length 165/170/175/180mm
Crank Arms forged aluminum / hollow type
Outer Chainring aluminum
Middle Chainring steel + composite
Inner Chainring aluminum
Chainring Bolts & Nuts aluminum (bolt), steel (nut)
Chain Guard no
Chaincase Compatible no
Bottom Bracket included
E-type FD Compatible yes
Chain Line 50mm
BB Shell Width 68/73mm
Average Weight 853g including BB