A very good thickness, robust Blockley butyl inner tube size 450/525x20/21 made from our own Blockley tooling, so we can supply the most wholesome uncompromised superior quality tube to fit the tyres that we produce. Nothing you can buy anywhere is anything like as good as this inner tube.

This Blockley tube has a good thick sidewall like in period, and made from the best tube material butyl, and has the rubber valve stem offset to fit a normal well base wheel rim. And most importantly it is sized correctly. There is no better tube made, or available, than this Blockley tube.  We made this tube only because we needed a perfect quality tube to supply with the Blockley tyres we produce. Dont forget to use rim bands too . . .

Note Blockley also have this tube available with a metal nickel plated stem.

For those wanting an "on centre" valve stem position, Blockley also supplies an "on centre" version of this 450/525-20/21 tube - as used on some Ford cars.