IRC Heavy Duty 18" Tube 4.00/4.50-18, 4.60/5.10-18, 110/100-18, 120/100-18, 130/80-18, 140/80-18

These tubes are 3mm thick and are a lot less bulky and lighter than the common 4mm Ultra Heavy Duty Tubes that are on the market . We Find these to be the best heavy duty tube in most cases as they are easier to fit and work with and add less rotating mass to the wheel and also reducing unsprung weight for the suspension to deal with.