Rear

Rear inner tubes are essential for maintaining traction, stability, and durability on any dirt bike. Whether you ride motocross, enduro, or trail, choosing the correct rear tube ensures proper tire support and reduces the risk of pinch flats. Rear tubes are sized to match common tire fitments like 100/100‑18, 110/100‑18, 120/90‑18, 100/90‑19, and 110/90‑19, with options ranging from standard to heavy‑duty and ultra heavy‑duty constructions. A properly fitted rear tube helps your bike hook up better, resist impacts, and stay reliable across all types of terrain.

Rear Tube Size Reference

• 80/100‑12 → Mini bikes

• 90/100‑14 → 85cc small wheel

• 90/100‑16 → 85cc big wheel

• 100/100‑18 → 125–250 enduro

• 110/100‑18 → 250–450 enduro

• 120/90‑18 → 450 enduro/off‑road

• 100/90‑19 → 125–250 MX

• 110/90‑19 → 250–450 MX

• 120/80‑19 → 450 MX