Overview Reviews Similar Products –> Product Description Seat post and expanding bolt for Motobecane mopeds. For use with any clamp on type bicycle seat mounts. Frame insert section 25.5mm Seat Mount 21.5mm Product Videos Custom Field Product Reviews Write a Review Write a Review Generic Motobecane Seat Post and Expanding Bolt Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *