Square Left Crank Arm (pre-2004 bikes) (matches Items -29 & -31)

Description

The Square Left Crank Arm (pre-2004 bikes) is a dependable replacement indoor cycling part designed for older Schwinn studio bikes that use a square-taper bottom bracket interface. Built for the schwinn ic pro and Johnny G models made before 2004, this schwinn square left crank arm restores smooth, secure pedal motion on heavily used commercial and home bikes.

• Fits many pre-2004 Schwinn indoor cycles, including the Schwinn IC Pro and Johnny G Pro Spinner® configurations using a square-taper left crank.
• Matches exploded-diagram reference Items #29 and #31 for applicable bikes and parts breakdowns.
• Designed for bikes manufactured prior to 2004; ideal when replacing a worn, stripped, bent, or loose left-side crank arm.
• Common choice when searching for a johnny g pro spinner® square left crank arm for older studio bike restorations and maintenance.

This replacement left crank arm is made to match the square-drive style used on earlier Schwinn indoor bikes, helping maintain proper pedal alignment and dependable power transfer during every ride. It is intended for the left side only and should be paired with the correct spindle and pedal hardware already on your bike. As an aftermarket replacement built to meet the fit and function of the original style, it offers a practical solution for refurbishing aging commercial cycles. Installation is generally straightforward for technicians or confident DIY owners using standard crank removal and installation tools.

OEM-quality replacement feel, easy DIY installation, and fast shipping from our warehouse.