Stem Lock Button - R4

Replacement Height Adjustment Pin for RoadRunner R4 Electric Scooter Maintain smooth and secure handlebar height adjustments with this replacement stem lock button for the RoadRunner R4. This locking pin is essential for controlling the handlebar height, ensuring it stays firmly in place while riding. Ideal for restoring functionality to a worn or damaged adjustment mechanism. Features: Specifically designed for the RoadRunner R4 Electric Scooter Controls and locks the handlebar height securely OEM-spec fit for reliable performance and easy installation Prevents unwanted movement during rides Perfect for replacing a worn, broken, or missing lock button