The Fox 36 Float Air Shaft Assembly 2021 is designed to enhance your ride with its new features. This 2021 model includes a top out bumper and a larger negative air chamber, ensuring a smoother experience and improved handling on rough trails. Compatibility and Fitment The Fox 36 Float Air Shaft Assembly 2021 is available in various sizes to suit different needs: 130mm, 140mm, 150mm, 160mm, and 170mm air shafts Compatible with Factory, Performance, and GRIP 27.5" / 29" 36 forks 170mm air shaft fits ONLY 27.5 or 29" LONG TRAVEL chassis 36 forks Important Note This air shaft is specifically for 2021 36 Float forks and does not work with earlier models.