Was excited to finally get my ring tyre pressure pump however on first use inflated motorcycle rear tire to 42psi I wanted to see how accurate it was. After checking with three separate manufacturer tyre pressure gauges all of which read there was actually 46psi in the tyre. So 4psi out . On reading the instructions for the ring pump it clearly states after you have inflated your tyre with the ring pump you should use “ other more accurate gauges “ to ensure you have inflated your tyres correctly. To be honest if I new I was going to need other more accurate gauges to determine correct tyre pressures then I wouldn’t have bought this pointless ring pump to inflate tyres in the first place. Waste of money.