Home / Recreation / Exercise Cycle Crank Arm Clamp 21976-53 Exercise Cycle Crank Arm Clamp 21976-53Price Not Available Price may not be up-to-date. Out of Stock View Product Part Number: 21976-53 Brand: BH NORTH AMERICA CORP Seller: Sears PartsDirect Category: Recreation Description This crank arm clamp (part number 21976-53) is for exercise cycles. Wear work gloves to protect your hands when installing this part.