This high quality replacement seat will fit all models of Indoor Cycling bikes and Spinning® bikes. This seat is meant for daily repeated use and is filled with a comfortable yet thin gel-like material. These seats are used in many different Spinning® and exercise bike studios and have no problem withstanding the rigors of constant use in a commercial environment. They will fit the Lemond Revmasters, Schwinn Indoor cycling bikes, Star Trac Spinning® bikes and Mad Dog Spinning® bikes.