Shimano Alivio FC-M4000 MTB Bike 9 Speed Crankset Crank Arm Ocralink 170mm ES25/300 Bottom Bracket

Option:
1, Crank arm only
2, Crank arm + BB: come with bottom bracket
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Model: FC-M4000
Level: Alivio
Color: Grey as picture
Speed: 9 Speed
Chainring: No chainring
Compatible chain: HG 9-speed
P.C.D.: 96mm 
Arm length: 170mm
Bottom bracket type: Octalink
Recommended bottom bracket: BB-ES25 or BB-ES300
Recommended bottom bracket axle length: 118mm
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Bottom bracket model: BB-ES25 /ES300
(BB-ES25 or BB-ES300, same performance and specification）
Axle length: 118mm
Type: Octalink
Shell width: 68mm
Shell thread: BC1.37" x 24T
Come with 2 bolts(M15)
Sealed cartridge keeps out dirt and water
Easy installation