Although offered ‘free’ online, there was still a carriage charge for this poor man’s pressure gauge. It’s big and cumbersome, making access tricky on some alloy designs, and has to be unclipped from its keyring before use. To get a reading, you remove the valve cap and replace it with the Quik-Chek, so a gauge would be less hassle. Worse still, the alerts were worryingly slow.