Artrax Tires has a well-earned reputation for high quality and low cost. Now Artrax brings that same value proposition to inner tubes! Each tube is a super-strong 60% thicker than any other heavy duty tube. These ultra-heavy duty tubes are made from high-quality butyl rubber with a thickness of 4 mm. Provides the ultimate in protection in severe applications and is perfect for use in any off-road competition. Priced so reasonably there is no reason not to have a few extras in your gear bag for when the riding gets ultra-rough.