PIVOTRAX 70/100-19 Heavy-Duty 3mm Butyl Inner Tube with TR4 Valve — Puncture-Resistant for Electric MX Bikes

PIVOTRAX heavy-duty inner tube is a 3mm puncture-resistant butyl replacement tube sized for 70/100-19 (also listed as 2.75/3.00-19, 80/100-19) wheels with a TR4 valve — designed for electric motocross and off-road bikes.

This inner tube is built to handle the demands of electric MX and off-road riding where thicker rubber and dependable valve fit matter. Constructed from butyl rubber with a reinforced 3mm wall, the tube balances resilience against punctures with the flexibility needed for reliable tire seating. It’s compatible with popular electric dirt bike models such as Surron Light Bee, Talaria, Rawrr, Caofen, Beta, 79Bike, SRPNT and many other machines that use the specified size.

How thick is this tube and why does thickness matter?

The PIVOTRAX tube uses a 3mm butyl construction, which is thicker than standard inner tubes. This extra material helps resist pinch flats and common trail punctures without sacrificing proper tire fit or ride quality.

• 3mm wall thickness for improved puncture resistance
• Butyl rubber for steady air retention and durability
• Thicker tubing reduces risk of snake bites on rough terrain

Will this tube fit my bike and tire size?

This tube is sized for 70/100-19 tires and also listed to fit equivalent markings like 2.75/3.00-19 and 80/100-19 where appropriate. Verify your wheel and tire size markings before purchase and confirm your rim accepts a TR4 (short) valve stem.

• Designed for 19-inch rear or front wheels in the specified size range
• Compatible with many electric MX models that use these sizing standards
• Check valve length clearance on your rim for the TR4 valve

What kind of valve does it use and how does that affect installation?

The tube is equipped with a TR4 valve, a common short-stem valve used on many off-road rims. Installation is straightforward: seat the tube inside the tire, align the valve through the rim hole, and inflate to the recommended pressure for your tire and load.

• TR4 valve compatible with most off-road rims requiring short valve stems
• Valve fits standard pump heads and adapters for quick inflation
• Ensure valve hole and rim washer fit before final mounting

How durable is it for trail and electric MX use?

Built from puncture-resistant butyl with a thicker 3mm profile, the PIVOTRAX tube is intended for the tougher conditions encountered in off-road and electric motocross riding. While no tube is invulnerable, this model adds a level of protection against common trail hazards.

• Reinforced material reduces chances of punctures and slow leaks
• Butyl composition provides stable air retention under load
• Suitable for repeated use and patching if damage occurs

Who is this for? Riders who need a robust, easy-to-install replacement tube for 19-inch off-road and electric motocross bikes will appreciate the PIVOTRAX 3mm inner tube. It’s aimed at commuters, trail riders, and weekend racers using Surron Light Bee, Talaria, Rawrr, Caofen, Beta, 79Bike, SRPNT and similar models who want improved puncture resistance and reliable inflation performance without modifying rims or tires.