Ring Digital Tyre Keyring Gauge RTG4

We love this long and slender keyring gauge as it’s similar to last year’s winner, the Michelin Key Chain gauge. Essentially it came down to price and the fact we preferred the light on this unit – you don’t have to hold the button for it to stay on. The RTG4 was faultless throughout the accuracy tests and we liked the fact the reading remained on display for a long time.