TRIWONDER Shock Absorber Suspension Seatpost for Mountain Bikes, 27.2mm, 28.6mm, 30.4mm, 30.9mm, 31.6mm, and 350mm (Black, 27.2 x 350mm)

✅ [Spring Suspension] The built-in spring coil and damper rubber absorb vibrations during riding, improving the seat post's comfort and shock absorption. You can adjust the rebound force by tightening or loosening the screw at the bottom. ✅ [Size Check] ★ Measure the required seat post size. ★ Take your current seat post and find the diameter printed on the bottom. Select the same size. ✅ [Hardness Adjustment] Use a hex wrench to adjust the shock absorber hardness. Counterclockwise adjustment is softer, clockwise adjustment is harder. Adjust according to your weight and road conditions. ✅ [High-Durability Material] Made of 6061 aviation aluminum alloy with an anodized surface. The waterproof and dustproof multi-layer sealing ring effectively protects the interior of the suspension seat post, preventing internal oil leakage and maintaining lubrication. ✅ [Compatible Vehicles] Road bikes, mountain bikes, cross bikes, MTBs, mini velos, regular bicycles, etc. ★ Make sure it is above the minimum safety line when installing.