- Specifications: seat post diameter options 31.8 mm or 33.9 mm; length 550 mm; colors available black and silver. - Shock absorption: the upper section includes a shock absorber spring with 55 mm (2.17 inches) travel to effectively reduce strong impacts from bumps, helping to lower vibration on rough roads. - Reversible, no need to remove the seat post: the head of the seat post can be opened directly. If you need to access items stored under the seat, you can take them out without removing the post, saving time and effort. - Size selection: suitable for your bike size and model. Check the size on your original seatpost, measure with a toothpick, or consult the previous seller to determine the correct seatpost for your model. - Use scenarios: - Daily commuting on uneven roads: enjoy reduced vibration and smoother rides thanks to the shock absorber. - Mountain biking or trail riding: improved comfort during rough sections and bumps. - Quick under-seat access: convenient to retrieve or store small items without removing the post.