Description
Wedge Pin Assembly – Medium Quality is a replacement Schwinn Airdyne bike parts item designed to secure the pedal crank to the bottom bracket shaft on older Airdyne models that use a wedge-pin style crank connection. This small but critical part helps restore a tighter, safer pedal drive fit when the original pin is worn, loose, or damaged.
- Fits older Schwinn Airdyne bikes that use wedge pins in the crank and bottom bracket assembly.
- Commonly associated with AD3 and AD4 models, where wedge-pin crank arms were used.
- Comparable in function to OEM reference 90821 used on certain legacy Airdyne applications.
- Not typically used on newer designs such as AD5 Pro/Comp square-axle versions or later belt-drive Airdyne bikes.
- Ideal if you need an airdyne pedal drive parts wedge pin assembly medium replacement for a worn original pin.
This schwinn wedge pin assembly medium quality replacement is the same general size and purpose as the original style pin, offering a practical aftermarket solution for repairing play in the crank-to-shaft connection. It is a non-OEM part, making it a budget-friendly option for older bike restorations and routine service. Installation is usually straightforward for experienced DIY owners, but it is important to inspect the crank arm and bottom bracket shaft for wear before tightening a new pin. If the surrounding holes are elongated or damaged, additional pedal drive components may also need replacement for a lasting repair.
OEM-quality fit alternative with easy DIY installation and fast shipping from our warehouse.



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