CST 80/100-21 TR4 MX/Enduro Heavy Duty Tube

CST 80/100-21 TR4 MX/Enduro Heavy Duty TubeAll Maxxis and CST Standard & Heavy Duty tubes are made from a special formula of high-density butyl rubber to ensure the tyre stays inflated.Our Heavy Duty Tubes are 33.33% thicker than our standard tubes.