Driving With Under-Inflated Tires Is Very Dangerous And CostlyDangerous Because A Tire With Insufficient Pressure Causes Poor Handling But Also And Above All A Risk Of Bursting Of The Tyre.Costly Because Under-Inflated Tires Increase To 10% Less Fuel Consumption And Wear Out Much Faster. The Pressure Listed In Your Service Manual. Your Hand Without Forcing Or Overtightening The Cap On Your Tire Valve.The Mechanism Thus Memorizes The Inflation Pressure.Then Check The Warning Lights Regularly .Color CodesGreen Indicator: The Pressure Is Good.Yellow Indicator (The Yellow Exceeds The Green): Attention, The Pressure Is Insufficient.Red Indicator (The Red Exceeds Green): Danger, Reapply Your Pressure Quickly!Available For 3 Pressure Ranges30Psi = +/- 2 Bars32Psi = +/- 2.2 Bars34Psi = +/- 2.4 BarsAdapt The Pressure Of Your Tires To Your Needs; The Actual Load Of Your Vehicle (The Heavier You Travel, The Higher The Tire Pressure Should Be: See Your Service Manual). When Going On Vacation, You Must Also Adapt The Pressure Of Your Tires To The Number Of Passengers, Suitcases, Use (Motorway, Etc.). Don'T Forget To Redo The Correct Tire Pressure, Taking These Parameters Into Account, Before Setting Off!