This Blockley superior  inner tube, with rubber valve stem, is marked for tyre sizes 450x19 and 500x19 only. Not to be confused with the usual low quality multisized offerings from the Classic tyre wholesalers.

The Blockley range of inner tubes, produced on our own Blockley tooling, with a generous thickness, are unlike anything else available, which is why we make them. Not only are they made using the best material Butyl, but with the correct thickness as they would have been in period, and the Blockleys are often double the weight of what we see elsewhere.  We manufacture this inner tube only for the 450x19 and up to 500x19 tyre sizes. A 350x19 has it's own tube. The 400x19 its own seperate tube. A 450x18 or 500x18 has it's own particular inner tube, and all this is because Blockley do not do the multisize thing that Classic car owners have had to put up with, which has come about presumably due to the cost cutting from the big suppliers. But importantly because we sell all Blockley tyres and tubes direct to the customer (as well as rim bands for the wire wheel wells), without the use of the Classic tyre Wholesaler companies, it means the best tubes in the world cost little more than the cheaper made alternatives, yet these Blockleys are perfection. There is no good reason for using any other brand of tube.