(2-Pack) 110/100-18 (4.50 X 18) Motorcycle Inner Tubes

These AR-PRO 110/100-18 (4.50 x 18) inner tubes are a two-piece set of 1.6mm natural rubber tubes built with TR4 valve stems for reliable off-road and motocross use.

Swap in a dependable pair of replacement inner tubes designed specifically for 110/100-18 tires. Made from standard 1.6mm natural rubber, these tubes are intended to flex with the tire, resist abrasion, and maintain a secure valve seat. Each pack contains two individually vulcanized tubes with TR4 stems that work with common pumps and are suitable for dirt bikes and other 18" rim off-road applications.

How will these tubes hold up on rough trails?

These AR-PRO tubes are produced from natural rubber formulated to resist abrasion and stretching, reducing the risk of sudden failure from common off-road stresses. The even molding and appropriate wall thickness help limit pinch flats and valve-area splitting when riding over rocks, roots, and ruts.

• 1.6mm standard wall thickness for balanced flexibility and protection
• Natural rubber provides superior abrasion resistance compared to some synthetic blends
• Vulcanized valve base prevents rotation and splitting around the stem
• Designed to withstand typical off-road impacts and rough terrain

Will these tubes fit my motorcycle wheels and pumps?

The tubes are sized for 110/100-18 tires (commonly referenced as 4.50 x 18) and are intended for 18-inch rims. They include TR4 valve stems — short, straight, threaded stems compatible with most hand pumps, compressors, and tire inflators used in motorcycle maintenance.

• Correct fit for 110/100-18 (4.50 x 18) tires and standard 18" rims
• TR4 threaded valve stems compatible with typical pump heads and caps
• Vulcanized attachment keeps valve seated for accurate inflation

How do these tubes help prevent common flats like pinch punctures?

The tubes are molded to minimize thin spots and irregularities that can pinch between rim and tire. Natural rubber’s flexibility absorbs impacts better than some stiff materials, lowering the risk of sudden pinch flats when landing jumps or hitting obstacles.

• Uniform molding reduces pinch-prone seams and weak points
• Natural rubber offers pliability that cushions rim-tire contact
• Enhanced puncture resistance to dampen small sharp-object penetrations

How many tubes are included and what maintenance should I follow?

This product is sold as a two-pack, giving you a ready spare for trail repairs or simultaneous replacement on dual-wheel setups. Proper installation, correct inflation pressures for your bike and riding conditions, and routine inspections around the valve base and bead area will extend tube life.

• Pack contains two AR-PRO 110/100-18 inner tubes
• Inspect for cuts, embedded debris, and valve seating before installation
• Use recommended tire pressure for your motorcycle and adjust for terrain

Who is this for: Riders who need a straightforward, cost-effective inner tube solution for off-road, dirt bike, and motocross tires that fit 18-inch rims. These AR-PRO tubes suit weekend trail riders, amateur racers, and mechanics looking for reliable TR4 valve compatibility and natural rubber resilience without specialty materials or custom sizing.