Generic 3.00-12 (80/100-12) Dirt Bike Inner Tubes — 2-Pack TR4 Valve, Heavy-Duty 3mm Rubber

Keep a reliable spare on hand with this two-pack of thick natural-rubber inner tubes engineered for small off-road wheels. Built to tolerate rough terrain and repeated impacts, these 3mm-thick tubes fit common 12" tires used on youth and small-displacement dirt bikes from brands like Kawasaki, Honda, Suzuki and more. The set includes valve caps and is intended as a direct replacement for 3.00-12 (also listed as 80/100-12) sizes.

Will these tubes fit my pit bike or mini motocross wheel?

These inner tubes are sized for 12-inch rims and tire widths typically labeled 3.00–3.50 inches, often sold as 80/100-12. They work with many small-displacement bikes and pit bikes that use a TR4 straight valve stem. Always confirm tire markings and rim compatibility before installing.

• Size: 3.00-12 (80/100-12) — for 12" rims
• Valve type: TR4 straight stem included
• Fits: common youth and mini dirt bikes (check tire sidewall)

How durable are these tubes for off-road use?

Constructed from natural rubber with a reported 3mm wall thickness, these tubes are designed to better resist abrasion and absorb shocks compared with lightweight road tubes. The seamless construction and reinforced valve area reduce the chance of leaks under rough riding conditions.

• Material: heavy natural rubber for puncture resistance
• Thickness: approximately 3mm for improved durability
• Valve strength: TR4 straight valve for wear resistance

What installation and safety tips should I follow?

Inspect the tube in water before inflation to locate leaks, and be cautious with tire irons and sharp tools to avoid slicing the rubber. Do not overinflate or subject the tube to loads exceeding tire specifications; avoid altering the mounted tire shape which can stress the tube when braking.

• Leak test: submerge before inflating to see bubbles
• Installation: use plastic tools or protect the tube from sharp edges
• Inflation: stay within recommended pressure to prevent burst

What comes in the box and what tolerance should I expect?

The package includes two inner tubes and two black valve caps. Because measurements are taken by hand, expect a small variance in reported size; allow for up to about 0.5–1 inch of measurement difference.

• Included: 2 inner tubes and 2 valve bonnets
• Color: black; seamless construction
• Tolerance: manual measurement may vary slightly

Who is this for: Riders, mechanics and parents who need robust spares for small dirt bikes and pit bikes will find this pair practical. If you own a mini motocross bike, a youth off-road bike, or a small-displacement trail machine that uses 12" tires, these heavy-duty tubes are a cost-effective replacement or backup for weekend rides, track days, and trail maintenance. They suit anyone who wants thicker rubber, reinforced valve stems, and straightforward compatibility with common 12" tire sizes.