Shimano ZEE FC-M645 83 mm Crankset

Shimano ZEE Crankset FC-M645 - For 83 mm bottom bracket width

The ZEE FC-M645 crankset from Shimano is compatible with 83 mm wide bottom bracket shells. Thanks to its resilient steel axle and steel pedal inserts, it presents itself as an indestructible platform for freeriders and downhill specialists. As a 4-arm single crank for Shimano 10-speed drivetrains, the FC-M640 comes with a 36-tooth chainring (104 mm bolt circle diameter) and in a stiff 2-piece design with two thick-walled aluminium crank arms.

Specifications:

Application:

Enduro, Downhill

Compatibility:

Shimano 1x10-speed

Chainring Mount:

104 mm bolt circle diameter, 4-arm

Technical Information:

Series:

ZEE M640

Crank Arm Material:

Aluminium

Chainring Material:

Aluminium

Axle Material:

steel

Gradation:

36-tooth

Crank Arm Length:

165.0 mm, 170.0 mm, 175.0 mm

Chainline:

57.9 mm

Q-Factor:

189.7 mm

Compatible BSA Shell Width:

83 mm

Bottom Bracket:

SM-BB52 Hollowtech II (SM-BB71-41C Pressfit optional)

Recommended Chain:

HG-X 10-speed (e.g. CN-HG95)

Compatibility:

Rear Over Locknut Dimension:

• thru-axle: 150 mm, 157 mm

Features:

• strong, thick-walled 2-piece crank arm
• resilient steel axle
• steel pedal insert
• painted crank arms, anodised chainrings
• stainless steel chainring bolts

Technology:

2-Piece Crankset
With the 2-piece designed cranks from Shimano, the right crank arm is precisely matched to the interaction with the bottom bracket. This increases the stiffness and keeps the weight low. Further spaced bearings also improve strength and contribute to more pedalling efficiency. The precision manufacturing of the bearings ensures easy installation and low maintenance. 2-Piece cranks share a 24mm axle diameter with Hollowtech II cranks, so they are also compatible with Hollowtech II bottom brackets.

Manufacturer Numbers:

165.0 mm 36 tooth:

E-FCM645AA6X

170.0 mm 36 tooth:

E-FCM645CA6X

175.0 mm 36 tooth:

E-FCM645EA6X

Contents:

• 1 x Shimano ZEE FC-M645 crankset (36 tooth)
• 1 x Shimano bottom bracket
• 1 x crank bolt
• 3 x bottom bracket spacers