RFX Race Rear Inner Tube (1.5mm/TR4) 350/400-14 RFX Race Series inner tubes are a good heavy duty inner tube. Available in a multitude of sizes.

RFX Pro UHD Rear Inner Tube (4mm/TR4) 400/450-18

RFX Race Rear Inner Tube (1.5mm/TR4) 300/325-12 RFX Race Series inner tubes are a good heavy duty inner tube. Available in a multitude of sizes.

RFX Race Rear Inner Tube (1.5mm/TR4) 325/350-16 RFX Race Series inner tubes are a good heavy duty inner tube. Available in a multitude of sizes.

RFX Pro UHD Rear Inner Tube (4mm/TR4) 400/450-19

RFX Pro HD Rear Inner Tube (2.5mm/TR4) 425/450-18 RFX Pro Series Heavy Duty Inner tubes are available in 2 different thicknesses, 2.5mm and 4mm. The increased thickness provides outstanding...