Replace a worn or missing seatpost plunger knob with this Keiser seatpost plunger knob.
This replacement seatpost plunger knob fits Keiser M3i bike models including 5507, 5508, and 5509. It is designed for seatpost use and matches the brand-specific fit needed for compatible Keiser bikes.
For more drivetrain and bike component options, browse Cycling Parts & Components Drivetrain. You may also be interested in related bike parts such as Bike Pedals, Schwinn Triple Link 2.0 Pedal Set, 9/16", Threaded, Look Delta.
This product is sold brand new. A manufacturer warranty applies only when the manufacturer provides one for this item.
Return requests must be submitted within 14 days of delivery and approved by our RMA department before the item is shipped back. Non-defective returns may be subject to a minimum 25% restocking fee and return shipping charges. Unauthorized returns are not eligible for credit or refund. Read the full return policy.
This product is sold brand new. A manufacturer warranty applies only when the manufacturer provides one for this item.
Return requests must be submitted within 14 days of delivery and approved by our RMA department before the item is shipped back. Non-defective returns may be subject to a minimum 25% restocking fee and return shipping charges. Unauthorized returns are not eligible for credit or refund. Read the full return policy.