IRC Motorcycle Inner Tube 140-150/90-15 — 3mm Heavy-Duty, Natural+Butyl Rubber

This IRC tube is engineered as a direct-fit inner tube for 140–150/90-15 motorcycle tires. Built in Japan to high manufacturing tolerances, it balances puncture resistance with flexible handling to support everyday riding and heavier loads. The 3mm wall thickness provides added protection against road hazards without compromising inflation stability or fit.

How does this tube hold up against punctures and rough roads?

The IRC 3mm construction increases resistance to common puncture sources compared with standard thin-wall tubes. The thicker rubber layer absorbs small impacts and reduces the chance of quick flats while still maintaining predictable tire feel.

• 3mm heavy-duty wall thickness for improved cut and puncture resistance
• Blend of natural and butyl rubber for toughness and air retention
• Designed to resist pinch flats under typical motorcycle use

Will this tube fit my 140–150/90-15 tire and valve setup?

The IRC Standard Motorcycle Tube is made to the size range 140–150/90-15, making it compatible with tires listed for those dimensions. Confirm your rim valve type (typically straight/schrader or bend/straight) and the tube’s valve specification before installing.

• Size marked as 140–150/90-15 for direct compatibility
• Fits standard motorcycle rim widths that accept those tire sizes
• Check valve type and length to match your wheel setup

What materials and quality standards are used in this IRC tube?

IRC manufactures these tubes in Japan using a mixture of natural rubber for flexibility and butyl rubber for superior air retention. Production follows quality controls intended to meet or surpass OEM factory specifications for durability and dimensional accuracy.

• Japanese-manufactured quality control processes
• Natural + butyl rubber blend for balance of elasticity and sealability
• Engineered to meet or exceed factory tube standards

How does installing a heavy-duty tube affect ride performance?

Installing a thicker tube like this IRC model slightly increases robustness but has minimal effect on ride comfort or handling when properly inflated. The design aims to preserve normal tire behavior while offering better protection against flats and tears.

• Maintains predictable handling when matched to correct tire pressure
• Slightly improved resistance to deformation under load
• Recommended inflation and periodic checks ensure consistent performance

Who is this for: Riders who want a robust, factory-quality replacement inner tube for 140–150/90-15 tires—commuters, touring motorcyclists, and those who frequently ride on imperfect road surfaces. Choose this IRC tube if you prioritize puncture resistance, reliable air retention, and a direct-fit OEM-style replacement manufactured to Japanese standards.