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The thick-wall aluminum construction and reinforced steel axle create added stiffness in the Zee two-piece cranks.
| Model | M645 |
| Series | Zee |
| Chain Compatability | 10-Speed |
| Crank Arm Length | 165mm, 170mm, 175mm |
| Chainring Material | Aluminum |
| Chainring Size(s) | 36T |
| Chainring Bolts | Steel |
| Weight | 835 grams |
| Bottom Bracket | HT2 Type, 83mm |