Fox Shox 36 Air Shaft Assembly Service Kit Time for a service on your Fox fork? Use only genuine Fox replacement parts. This air shaft allows you to change the travel of your 2018 Fox Float 36 fork to 160mm, 170mm or 180mm, or use it to replace a worn-out part. Features Genuine Fox Shox replacement part Fox part #820-02-536-kit, 820-02-535-kit, 820-02-534-kit | Fox Racing Shox | 36 Air Shaft Assembly Service Kit 2018-20 2018+, Float 36, 150Mm, 820-02-537-Kit