SURIEEN 170mm Left Bike Crank Arm Set, Aluminum Alloy Bicycle Arm, Single Speed Crankset Replacement Parts for Mountain Road Bikes

Reliable Left Crank Replacement: This package includes a single left-side crank arm designed for single-speed bikes. It features a diamond/rhombus hole spindle interface—please confirm your bike's crank orientation matches before purchase to ensure a proper fit 170mm Crank Length: The 170mm arm length provides an optimal balance between leverage and cadence, helping to reduce drivetrain friction and noise while supporting smooth, stable chain retention for a more efficient ride Durable Aluminium Alloy Build: Crafted from high-strength aluminium alloy, this crank arm offers excellent durability, high axial strength, and resistance to bending or deformation. It delivers reliable performance for daily commuting and recreational rides Wide Compatibility: This left crank arm is designed to fit a variety of bicycles, including mountain bikes, road bikes, city commuters, folding bikes, e-bikes, and exercise bikes—making it a versatile replacement choice Quick and Simple Installation: Featuring pre-drilled holes, this 170mm crank arm allows for a fast, tool-friendly installation. Get your bike back on the road with minimal time and effort