Shop bicycle seatposts and seatpost clamps for road bikes, mountain bikes, gravel bikes, and more. Find replacement seatposts, saddle mounting components, and seat clamps in a variety of sizes, materials, and designs. Whether you're upgrading your bike fit or replacing worn components, explore quality seatposts and clamps from trusted cycling brands at Sport Factory Pro Shop.
Bike seatposts come in various diameters such as 27.2, 30.0, 31.6 to name a few common ones, as well as various lengths. Smaller bikes will generally need a shorter seatpost and may use a smaller diameter, but not always. Seatposts also have a setback. A zero setback will locate the seat directly over the top of the seatpost and is more conducive to a forward position, whereas a 25mm setback will be located 25mm rearward. If your seatpost is dropping, you may need to replace your seatpost clamp, especially if the bike's clamp opening is almost closed. Mountain bikes may use a "dropper" seatpost which allows the seat to remotely drop out of the way for easy maneuvering.
