The left-hand, non-drive-side crank arm for VelectriX mid-drive eBikes with a Bafang M200, M400 or M410 motor. It's 170 mm long with a square (diamond) taper, and replaces a bent, cracked or loose-fitting arm without buying a whole crankset.

• Left side only: the matching right (drive-side) arm is VXAUS10543.
• 170 mm length: match it to your right arm so both pedals turn the same circle.
• Square taper interface: listed by VelectriX as a diamond taper fit.

When to replace it

An arm that's been ridden loose can wear its taper and never tighten properly again. If yours keeps working loose or clicks with every pedal stroke, a new arm is the fix.

Fit and compatibility

Made for Bafang M200, M400 and M410 mid-drive motors. Check your current arm is a 170 mm left arm; the length is usually stamped on the inside. The M210 and M510 aren't listed for this arm, so ask us if your bike runs one of those.

Tune Cycles can fit it and torque it correctly so it stays tight.