RING AU­TO­MO­TIVE RTG7

Car Mechanics (UK) - - Product Test -

This is the only unit with an ad­justable, 360° swivel-head, so the an­gle that the gauge is fit­ted onto a valve can be al­tered, al­though we some­times strug­gled to fit it with­out al­low­ing air to es­cape. It’s the heav­i­est unit on test, weigh­ing 168g (the light­est is the Ac­cu­tire at 21g and the next heav­i­est is Sealey’s TSTPG11 at 73g), and the only one sup­plied in a small fab­ric carry case.

Ring’s gauge in­cludes a use­ful mem­ory func­tion, which dis­plays val­ues for the front and rear tyre pres­sures. The val­ues are straight­for­ward to set and the read­out not only dis­plays the tyre pres­sure, but also whether the read­ing is low, high or OK. The tyre pres­sure doesn’t need to be spot-on to get an OK – we tested a tyre that was a mere 0.1psi lower than the value stored in the mem­ory and the read­out said it was OK.

Other fea­tures in­clude a torch and a tread depth in­di­ca­tor. The read­out is per­ma­nently back­lit and the gauge is pow­ered by two CR2032 bat­ter­ies, ac­cessed via a panel on the back and a sin­gle crosshead screw. The mem­ory func­tion was re­tained when we re­moved the bat­ter­ies for a few sec­onds and re­fit­ted them. The tread depth in­di­ca­tor pro­vides a range from 0.5-15.5mm. For tyres that are close to the UK’S 1.6mm limit, the scale can be dif­fi­cult to read, even if you’re be­ing a lit­tle cau­tious at 2-3mm.

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