PIVOTRAX Motorcycle Inner Tube 90/90-21 / 80/100-21 (3.00x21) — 3mm Thick Butyl with TR4 Valve

The PIVOTRAX heavy-duty motorcycle inner tube is a 3mm-thick, puncture-resistant butyl tube designed to fit 90/90-21 or 80/100-21 (3.00 x 21) off-road wheels and equipped with a TR4 valve for easy installation.

This inner tube is built for riders who demand durability and reliable air retention during motocross, enduro, dirt, and adventure riding. Constructed from reinforced butyl rubber with a seamless body and a TR4 valve stem, the tube aims to reduce leaks and stand up to rocks, roots, and rough terrain. It’s sized to match common 21" front wheel setups and engineered to fit a wide range of bikes—from dirt bikes and dual-sport machines to certain adventure and cruiser models when applicable.

Will this tube fit my 21" front wheel model?

Yes — the PIVOTRAX tube covers common 21" front sizes. It is intended for 90/90-21 or 80/100-21 tires, often used on off-road and dual-sport front wheels. Check your tire sidewall size to confirm compatibility.

• Fits 3.00 x 21 and equivalent 90/90-21 and 80/100-21 tires
• Compatible with many motocross and dual-sport bikes
• TR4 valve fits standard rims requiring rubber-stem valves
• Refer to your owner’s manual for exact fitment guidance

How does the 3mm thickness help me on trails?

The 3mm wall increases puncture resistance and improves durability under rugged use compared with thinner tubes. While it doesn’t make the tube puncture-proof, the thicker butyl layer helps resist pinches from rocks and roots and prolongs service life between replacements.

• Thicker butyl reduces likelihood of pinch flats on rough terrain
• Better durability against abrasion and small punctures
• Maintains structural integrity under variable tire pressures
• Useful for aggressive off-road and mixed-surface riding

What installation and maintenance should I expect?

Installation is straightforward thanks to the TR4 valve stem and a seamless tube design that eases mounting inside the tire. Routine checks of pressure and a quick inspection for cuts or foreign objects will keep the tube performing well between rides.

• TR4 rubber valve allows easy hand or tool installation
• Seam-free construction lowers chance of slow leaks
• Inspect for sharp debris before mounting the tire
• Maintain recommended tire pressure for your bike and terrain

Which motorcycles are commonly compatible with this tube?

This inner tube suits many off-road and dual-sport models that use 21" front wheels. It pairs with a wide roster of bikes from Japanese, European, and American makers where the stated sizes match the wheel and tire specification.

• Common fits: Honda CRF series, XR, Africa Twin variants
• Yamaha, Kawasaki, Suzuki off-road and dual-sport models
• Selected KTM and BMW adventure bikes with matching front tire sizes
• Also suitable for certain custom or retrofit wheel setups

Who is this for: The PIVOTRAX 3mm inner tube is aimed at riders who take their bikes off paved roads frequently — motocross competitors, trail riders, enduro and dual-sport enthusiasts, and anyone who wants a more robust replacement tube for a 21" front tire. If you need a thicker, seam-free butyl tube with a TR4 valve for easier installation and improved puncture resistance, this product is designed to meet those needs while covering a broad range of compatible models.