135/145x13 Standard Inner Tube
A standard 135/145-13 tube. Note that since Blockley produced a 145R13 tyre size it was decided to make an even better quality heavier duty version of this 135/145R13 tube which costs a little more than the standard tube listed here.
Made from Butyl, this is a good quality albeit standard thickness inner tube, and priced accordingly. We also produce a heavier duty thicker version of this 135/145-13 inner tube size.