SURIEEN 170mm Left Bike Crank Arm, Aluminum Alloy Single Speed Crankset Replacement for Mountain & Road Bikes (Square/Rhombic Hole)

• 【Premium Construction】 The crank arm is made from high-strength aluminium alloy for enhanced durability, high axial strength, and long-lasting performance without deformation.
• 【Precision 170mm Crank Length】 Ensures optimal chain retention, reduces friction and noise, and extends the overall lifespan of your bike's drivetrain.
• 【Universal Compatibility】 Designed as a left-side crank arm suitable for mountain, road, city, folding, e-bikes, and more.
• 【Easy Installation】 Features precision-cut holes and a clear left/right marker for hassle-free installation and a perfect match with your bike’s bottom bracket.
• 【Exquisite craftsmanship】 Fine polished with a scratch-resistant matte black coating that is both stylish and built to withstand daily wear and tear.

Material: Aluminium Dimension: 170mm/67inch Colour: Blank Weight: About 350g Pedal end: 14MM thread Notes: Be sure to distinguish square and diamond holes when buying crankset. Crank arm is only for the left side of the chainring, and only one crank leg is needed for a chainring.