Replacement Flywheel: Todays tightly packaged clutch systems leave little room for error. The clearance between the disc damper and the flywheel-to-crankshaft bolt heads is so small that the flywheel must be replaced with every clutch installation.
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Sunny Health & Fitness Indoor Cycling Exercise Bike with Heavy-Duty 49 LB Chrome Flywheel, Stationary Bike with Customizable Comfort with 275 LBS. Max Weight – SF-B1002
Heavy-Duty 49 LB FlywheelThis exercise bike is equipped with a 49 lbs heavy-duty flywheel that delivers a natural, smooth, and consistent cycling workout