Aluminum Left Bicycle Crank Arm With Square Spline, Replace For MTB And Ebike

You snapped a left crank arm and need a direct replacement. This BUCKLOS aluminum arm restores your bike's drive so you can ride again. The solid AL6061 construction handles pedal stress while keeping overall weight low.

Select the length that matches your leg size from 152mm, 170mm, or 175mm options. The square, diamond, or spline hole design fits common crankset interfaces, making the swap quick. The black surface maintains a clean look on mountain bikes and road bicycles alike.

Benefits & Tips

• Pedaling power: Longer cranks provide extra leverage for steep climbs. Choose 175mm if you need more torque or prefer a wider gear spread.
• E-bike reliability: This arm builds stable transmission under heavy load. We recommend using the left-right pair configuration when mounting electric motors for better durability.
• Fast repair routine: Keep a spare in your bag to replace broken parts immediately. Installation requires standard tools and takes less than 10 minutes.

Product Specifications

• Brand: BUCKLOS
• Material: AL6061 Aluminum Alloy
• Color: Black
• Lengths: 152mm, 170mm, 175mm
• Hole Type: Square/Diamond/Spline
• Weight (Single Left): Approx. 0.19kg at 152mm, 0.24kg at 170mm

Package includes:

• One left crank arm or a left/right pair, based on your purchase choice.

Reminders

• Fit check: Confirm the hole shape matches your bike's crankset before installing.
• Indoor use: The paired setup excels on indoor training rigs and e-bikes where continuous force is applied.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

Serving cycling needs with trusted parts since 2002 via intercyprus.com.