33 YEARS of tyre kicking hasn’t done my boots any good, but it has saved me the trouble of sitting on the hard shoulder on numerous occasions, it’s a lot easier to get it sorted in the yard than wait for a lane closure and a tyre fitter… it may not be accurate but i can tell if a tyre is under inflated or indeed flat…
Years ago on the Costas I stopped at a cafe ’ midday ,got out the cab & this little guy approached me with the biggest mallet I have ever seen .I thought he was a mugger but it was part of the service, every truck that stopped there got the tyre check. Imagine the relief when he hit the tyres instead of me. 
I used to use a rounders bat, baseball bats are for Yankee’s with big hoods’ The bat would bounce of the tyre in a certain way if inflated, it wouldn’t bounce if the tyre was underinflated, simples 
Regards
Dave Penn;
Am I the only one here who owns a tyre pressure gauge checker? Checks ups to 130psi and has caught an old supervisor out who used to know EVERYTHING…till I asked him if he felt his tyres were ok at 80 psi instead of 120 
the ■■■■■