Seatpost Shim Adapters quite literally fill the gap with mulitple size configurations available. These Seatpost Shim Adapters are compatible with static suspension and dropper Seatposts as well as all frame materials.Made of premium quality aluminum and have been manufactured within stringent tolerances to match or surpass the highest quality standardsRiders can to tune and adjust the compliance of their ride by swapping the original seatpost for a post with a smaller diameter Premium manufacturing ensures that these seatpost adapters won't scratch the post