Beefy Forged Alloy 6061 Bike Crank Arms 89mm 102mm 114mm 127mm 140mm 152mm 160mm 165mm 170mm 175mm For Ebike With Square Hole Mid Mount Torque Ready And Durable Construction

Durable forged 6061 alloy crank arms for e-bike square hole
✔️ 2x crank arms, 10 sizes 89-175mm, square hole 12cm

These crank arms are forged from 6061 aluminum alloy for e-bike square-hole mid-drive setups. They replace standard arms on compatible frames and help tailor pedal reach and stiffness in performance bikes.

✅ Material: Forged 6061 aluminum alloy for durability
✅ Sizes: 89mm, 102mm, 114mm, 127mm, 140mm, 152mm, 160mm, 165mm, 170mm, 175mm
✅ Spindle interface: Square hole, L/R orientation, 12cm diameter
✅ Package: 2 crank arms + crank bolts for Ebike mid-drive torque

💡 What is a square-hole crank arm set used for on mid-drive e-bikes? This is a technical question for riders evaluating upgrades.
This interface keeps crank arms aligned and transfers torque reliably.
- Provides a secure interface between crank arms and the square spindle
- Maintains proper alignment under load for efficient power transfer
- Enables easy replacement on compatible mid-drive frames

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