Bike Seat Clamp Quick Release Aluminium Mountain MTB BMX Road Bike Seatpost Clamp 254mm 286mm Bike Saddle Seat Clamp _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ 25.4mm 28.6mm Quick Release _x000D_ MTB Bicycle Seatpost Clamp Aluminum Alloy Mountain Bike Seat Post Clamp_x000D_ Feature:_x000D_ 25.4mm is generally suitable for seat posts with a diameter of 22.2mm;_x000D_ 28.6mm is generally suitable for seat posts with a diameter of 25.4mm (also for some steel frame models with 27.2mm seat tubes);_x000D_ The above parameters are only applicable to general aluminum alloy frames and carbon fiber frames. For some steel frames, iron frames and other ultra-light material frames, due to the different thickness of the frame tube wall, the applicable seat tube clamp size will vary._x000D_ _x000D_ Specification:_x000D_ Material: aluminum alloy_x000D_ Product color: Black/Silver_x000D_ Inner diameter: 25.4mm/1.00", 28.6mm/1.13"_x000D_ Product size: about 65x45x18mm/2.56x1.77x0.71" (25.4mm)_x000D_ 65x48x18mm/2.56x1.89x0.71" (28.6mm)_x000D_ Product net weight: about 36g (25.4mm), 38g (28.6mm)_x000D_ _x000D_ Measuring method of seat post clamp size:_x000D_ It is roughly the outer diameter of the seat post, which is approximately equal to the size of the seat post + 2 times the thickness of the frame tube wall._x000D_ _x000D_ Note:_x000D_ 1. There may be slight size deviations due to manual measurement, different measuring methods and tools._x000D_ 2. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor._x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ 1 X Bicycle Seatpost Clamp _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_