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

All 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. Recommended for Motocross and Supercross racing

All Maxxis and CST Extra Heavy Duty tubes are made from the same special formula of high density butyl rubber as our standard and Heavy Duty tubes.

Extra Heavy Duty tubes are 100% thicker than the Standard tubes Recommended for Enduro and Extreme Enduro