Fox 36 Glidecore Air Shaft Assembly The Best 36 Air Spring to Date Fox's Glidecore air spring reduces friction while the fork is under dynamic load through its compliant design. Pair that with reduced breakaway friction compared to the previous generation air spring, and you get the best 36 air spring to date. Use this air shaft assembly to change the travel of your Fox 36, or upgrade a previous-generation fork to the latest Glidecore performance. Features FLOAT Glidecore air spring - Fox's most compliant air spring yet, minimizing friction and binding under load Dynamic response lets the piston move in harmony with the fork under stress for smoother suspension action Large cross-section O-rings dampen motion and further reduce breakaway friction Improved performance under load maintains suspension smoothness through high-speed impacts and aggressive terrain Adjustable travel lets you fine-tune your fork to match your terrain and riding style | Fox Racing Shox | 36 Glidecore (Na3) Air Shaft Assembly 140Mm