Product: Left Crank Arm, 170mm — precisioncut, aluminium alloy, 100% brand , 180day Key benefits Direct replacement for damaged or worn left crank arms: precisioncut mounting hole ensures an easy, secure fit on bikes using standard crank interfaces. Restores safe, reliable pedaling performance without interfering with the opposite crank arm or chainring bolts: 170mm length designed to avoid overlap with the right crank and chainring hardware. Lightweight and durable: quality aluminium alloy resists deformation and wear for longlasting service while keeping rotating weight low. Clean, finished appearance: fine polish and quality paint provide a professional look and stable surface protection. What it does and how it helps Replaces a damaged or bent left crank arm quickly and accurately, letting you the bike to normal use without lengthy downtime. Precision cutting of the mounting hole reduces fitment issues and simplifies installation, saving time and avoiding trialanderror adjustments. The 170mm length preserves original pedaling geometry and cadence for predictable handling and comfort. Key specifications Position: Left crank arm Length: 170 mm Mounting: Standard precisioncut mounting hole (designed for standard crank interfaces) Condition: 100% brand Material: quality aluminium alloy Finish: Fine polish with quality paint : 180 days Performance and build quality Manufactured with careful workmanship for consistent dimensions and surface finish. Aluminium alloy construction offers a balance of light weight and structural strength, resistant to deformation under normal riding loads. Surface polish and paint improve corrosion resistance and maintain appearance under regular use. Typical use scenarios after a fall or impact: a bent or cracked left crank arm to restore safe pedaling and chainline alignment. Routine maintenance or parts replacement: Keep a spare left crank arm on hand for quick swaps during tuneups or when servicing a bike fleet. Urban commuting or recreational upgrades: Swap in this lightweight, wellfinished arm to refresh the bike's appearance while maintaining reliable function. Installation notes Designed for straightforward installation on bicycles that use standard left crank interfaces; the precisioncut hole is intended to align cleanly with the corresponding mounting hardware. Verify that your bike uses a compatible standard crank mounting system before installing. and support This product includes a 180day . If you have questions or encounter issues, contact us for assistance and we will help resolve the problem.