Kenda 2.75/3.00-21 (80/100-21) Tube.
Kenda Motorcycle Tube 2.75/3.00-21 (80/100-21) TR-6
Kenda Tuff Tube. Over 2 times thicher than OEM tubes. Formed of butyl rubber to prevent air leaks over time. Extra thick rubber specifically designed for off road use.