Inner tube 3.50/4.00-6 TR 13

Inner tube 3.50/4.00-6 TR 13 for trailer

Inner tube for tyre dimension 3.50/4.00 on a 6" rim, with a TR 13 valve and a width of 101 mm. The tube for an 8" rim, 4.00-8, is article 6092020.

Tube, valve and rim

Three things have to line up when you buy a tube: the tyre dimension, the rim size and the valve. The valve is the one that gets overlooked. TR 13 has to match the hole in the rim, in size and in the way it sits, or you cannot reach it to inflate the wheel once it is assembled. Fit a new tube rather than patching one that has perished, and run a hand round the inside of the rim for burrs before the tube goes in.