Cheap And Discounts 25.4/28.6/31.8/34.9mm Bicycle Seatposts Clamps Mountain Bike Seat Posts Clamp Clips Quick Release Aluminum Alloy Seat Tube Clamp Wholesale. Buy Directly From Merchant SportFit Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.