IRC Components Heavy Duty Inner Tube 70/100-19 — 3mm Thick, TR-4 Metal Valve

This inner tube is engineered to withstand demanding conditions and heavy use. Built from a blend of natural and butyl rubber, the IRC Heavy Duty Tube balances elasticity and air retention while adding a tougher, puncture-resistant construction. It meets or surpasses original equipment benchmarks and is suited for a range of small-displacement motocross and trail bikes.

What makes this tube tougher than a standard inner tube?

The IRC tube uses a thicker 3 mm wall and a rubber compound mix that improves tear resistance and reduces puncture frequency. That design increases tolerance to rocks, roots, and aggressive riding without sacrificing inflation stability.

• 3 mm wall thickness for increased durability
• Natural + butyl rubber blend for resilience and sealing
• Puncture-resistant formulation suitable for off-road use

Which bikes and tires is the 70/100-19 tube compatible with?

This size is intended for 70/100-19 tires and fits a number of small-displacement motocross and trail models. Check fitment with your bike’s manual, but common factory compatibilities include recent GAS GAS and older Honda models listed by IRC.

• Fits 70/100-19 tires (standard motocross/trail sizing)
• Compatible with GAS GAS MC85 (model years 2021–2024)
• Compatible with Honda CR80RB (1996–2002), CR85RB (2003–2007), CRF100F (2004–2013)

How is the valve configured and what does that mean for installation?

This tube uses a TR-4 straight metal valve stem with an 8 mm diameter, the common size for many off-road wheels. The rigid metal stem aids straightforward inflation, is easy to access through valve holes, and resists bending when using compressors or hand pumps.

• TR-4 straight metal valve, 8 mm diameter
• Sturdy stem simplifies high-pressure inflations and frequent servicing
• Standard valve threading fits typical caps and valve tools

Who is this for? Riders who push small-displacement motocross, trail, and enduro bikes and need a dependable replacement tube will benefit most. If you value long service life, fewer flats on rough trails, and OEM-level quality from a Japanese manufacturer, the IRC Heavy Duty Tube 70/100-19 is designed to give you extra protection without adding complex installation steps. Ideal for mechanics, race teams, and weekend trail riders wanting a robust spare for front or rear 19" wheels.