Description
The ISIS Left Crank Arm (2004-present) is a direct-fit indoor cycle replacement crank arm for the Schwinn Johnny G Pro Spinner®. Designed for the non-drive side, this part restores smooth, secure pedaling on bikes using the later ISIS bottom bracket system, making it a dependable choice for routine johnny g spinner parts service.
- Fits Schwinn Johnny G Pro Spinner® bikes from 2004-present using an ISIS-style bottom bracket.
- Matches diagram references item #29a and item #31a on Johnny G Pro parts breakdowns.
- Compatible with the left/non-drive crank position only; pairs with the right crank/sprocket assembly on corresponding 2004+ models.
- An ideal replacement when you need a johnny g pro spinner® isis left crank arm for worn, stripped, or damaged original hardware.
This isis left crank arm schwinn johnny replacement part is built for the splined ISIS interface used on later Johnny G Pro indoor bikes, helping maintain proper pedal alignment and rider feel. It is intended to replace the left arm only and should be installed on compatible 2004-present units after confirming your existing crank style and diagram callout. As a precision-fit service part, installation is generally straightforward for a technician or confident DIY owner with the proper crank removal and fastening tools. Always inspect the spindle, pedal threads, and fixing hardware before reassembly for best results.
OEM-quality replacement with easy DIY installation potential, and ships same day from our warehouse.
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