Reduces the need to carry CO2 canisters or spend loads of time pumping. Quick and efficient tyre inflation, but struggles to seat tyres and is not waterproof.

I bought a new 2006 Mini, when Mini-mania was in full swing. It was a leftover car, as brand-owner BMW did a top-to-bottom makeover of the Mini for 2007, ditching the Brazil-built four-cylinder ...