FOX 36 Air Shaft Assembly - 2019, 140mm, FLOAT. Are you needing a little less travel out of your 2018 Fox Float 36?. This is all you need to bring your 27.5 or 29" Fox Float 36 to 140mm of travel! No need for special tools, or any other parts, this will be the only thing you need to change the travel and get ripping on those trails again.