TUSK Motorcycle Inner Tube 110/100x18 & 120/100x18 — 4mm Ultra Heavy Duty Reinforced Butyl, TR-4 Valve

TUSK Ultra Heavy Duty 4mm motorcycle inner tube is a reinforced butyl tube built for off-road riders who need maximum puncture resistance and reliability for 110/100x18 and 120/100x18 wheels.

Built with a beefy 4 mm wall thickness and high-quality butyl rubber, this replacement tube is designed to tolerate rocks, roots and repeated impacts common to trail and enduro riding. The TR-4 valve stem provides a reliable inflation point compatible with common rims and pumps, while the reinforced construction minimizes flats and improves on-trail durability. It’s a straightforward upgrade from standard tubes when longevity and peace of mind are priorities.

How does the 4 mm construction help on rough trails?

The thicker rubber increases resistance to punctures, pinch flats and abrasive wear compared with conventional tubes. Its added mass also better absorbs small impacts, reducing the chance of sudden failures when you hit obstacles.

• 4 mm wall thickness for improved puncture resistance
• Reinforced butyl compound resists abrasion and stretching
• Reduced incidence of pinch flats on rocky terrain
• More durable under repeated off-road loading

Will this tube fit my tire sizes 110/100x18 and 120/100x18?

Yes. The TUSK Ultra Heavy Duty tube is sized to work with both 110/100x18 and 120/100x18 tire dimensions, offering a secure fit across those common off-road wheel widths. Ensure your rim and tire specification match these sizes before installing.

• Pre-sized specifically for 110/100x18 and 120/100x18 tires
• Fits standard 18-inch rim diameters used on many dirt bikes
• Check rim clearance if running very narrow or wide aftermarket rims
• Compatible with most off-road tire profiles in these sizes

What valve and installation details should I know?

The tube uses a TR-4 (TR4) valve stem, a common choice for dirt-bike inner tubes that supports standard compressors, hand pumps and valve-core tools. During installation, take care to seat the tube evenly in the tire to avoid pinching and use correct tire pressure recommended by your tire and bike manufacturer.

• TR-4 valve stem for wide pump and tool compatibility
• Install carefully to prevent pinching the 4 mm rubber layer
• Use proper inflation pressures for your bike and riding conditions
• Inspect rim edges and tire interior before fitting the tube

How does this tube compare to standard or lightweight options?

Compared with lightweight street or trail tubes, the TUSK 4 mm tube trades small weight savings for much greater durability and puncture protection. It’s intended for riders who accept a bit more rotating mass in exchange for fewer roadside repairs and longer service life.

• Greater puncture resistance than standard thin-wall tubes
• Sacrifices minimal weight for significantly higher durability
• Better suited to aggressive off-road use than lightweight tubes
• Lower long-term maintenance and fewer emergency tube changes

Who is this for: Off-road, enduro and dual-sport riders who regularly tackle rocky trails, roots and technical terrain and want a dependable inner tube that reduces the risk of flats. If your priority is maximum durability and fewer mid-ride tube changes for 110/100x18 or 120/100x18 tires, the TUSK Ultra Heavy Duty 4 mm tube is a practical upgrade over thinner, standard tubes.