Left Crank Arm M3+

Description

Left Crank Arm M3+ is a genuine replacement indoor cycling crank component designed to restore smooth, secure pedaling on compatible Keiser bikes. Ideal for worn, stripped, or damaged arms, this part fits the Keiser M3+ and helps keep your bike performing like the original using dependable keiser m3 replacement parts.

• Compatible with Keiser M3+ indoor cycles and commonly referenced with OEM part number 555421.
• Also cross-referenced in parts listings for Keiser M3 and some M Series service diagrams using part number 555421; always confirm your model before ordering.
• Built as an m3+ flywheel crank parts left crank arm replacement for bikes needing a direct-fit left-side arm.
• Designed as a proper keiser left crank arm for the non-drive side pedal position.

This left crank arm is an OEM-style Keiser replacement made to match the fit and function of the factory-installed component on the M3+ platform. It mounts on the bike’s left side and provides the stable pedal attachment point needed for efficient, balanced riding. If your original arm has damaged threads, excessive play, or visible wear, replacing it can improve pedaling feel and reduce drivetrain-related movement. Installation is typically straightforward for a qualified DIYer or service technician using the correct crank removal and fastening tools. For best results, compare your original part number and bike model before purchase.

Count on this OEM-quality replacement for reliable fit, smooth operation, and fast service from our warehouse.