PROWHEEL Ebike Crank Arm Available in Square Hole

170 mm crank arms, one pair
Square hole fitting
Aluminum alloy construction
Ebike crank arm, unisex adult

Last refreshed Oct 3, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A pair of aluminum alloy crank arms with a square hole, sold for electric bikes. The listing is very short, so bolt circle, taper details and hardware are not confirmed.

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ASIN: B0B9L1XHWWModel: A00CWU-170Category: Cranksets

Sizes Available

One Pair Crankarm 140mmOne Pair Crankarm 152mmOne Pair Crankarm 160mmOne Pair Crankarm 165mmOne Pair Crankarm 170mmOne Pair Crankarm 175mm

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Overview

Swapping the crank arms on an electric bike is the job this Prowheel pair is made for, with a square hole for the spindle and a body of aluminum alloy. The listing sells the arms as a pair in a single length.

The reason to look at it is the match to a square fitting on an ebike drivetrain. The limitation is how little the listing says: no weight, bolt circle or screw information appears.

Who it's for

Someone replacing crank arms on an electric bike that has a square interface and takes this arm length. Riders who are unsure of their spindle type should check it before ordering.

Pros and cons

Pros

Aluminum alloy arms
Sold as a pair
Square hole interface
Meant for ebike use

Cons

Bolt circle not listed
Hardware inclusion not stated
Only one length here

Performance notes

Arm length sets leverage at the pedal, and the square hole must match the spindle for a secure fit. Aluminum alloy limits weight, but the listing gives no figure to compare.