Please note: Your choice of seat clamp size depends on the frame tube size where the seatpost enters the frame (seat tube). We would recommend that you remove your old seat post clamp and measure the frames external seat tube diameter to give the size required. It should match up to the sizes listed in the options

Please check if your bike seatpost is 34.9mm/31.8mm/28.6. The "28.6","31.8", "34.9" refer to the seat post tube diameter not the seat post diameter!. Ergonomic design,Extended lever, more efficient and comfortable. Easy to Use. High Quality (ISO 9001,14001). Weight: Approx 45 gram. Material: 6061 Aluminum Alloy.

Item Weight: 45 Grams. Style: Ergonomic. Color: Red-. Brand: WILE. Material: Aluminum. Date First Available: September 21, 2018. Best Sellers Rank: #221,420 in Sports & Outdoors. Customer Reviews: 4.4 out of 5 stars 95 ratings 4.4 out of 5 stars. : B07HKWG458. Size: ?34.9. Style: ?Ergonomic. Part Number: ?Spc01. Manufacturer: ?shenzhen yueer. Material: ?Aluminum. Color: ?Red-. Brand Name: ?WILE. Item Weight: ?45 Grams. Package Weight: ?0.05 Kilograms. Item Package Dimensions L x W x H: ?4.61 x 2.8 x 0.59 inches.