Michelin Truck Tire Data Book - Wanderlodge Owners Group

STATIC AND LOW SPEED LOAD AND PRESSURE COEFFICIENTSDo not exceed loads or air pressure limits of the wheel or rim withoutpermission of the component manufacturer.TIRE AND RIM ASSOCIATION STANDARD(These Tables apply to tires only. Consult rim/wheel manufacturer for rim/wheel load and inflation capacities.)A. METRIC AND WIDE BASE TIRESThe service load and minimum (cold) inflation must complywith the following limitations unless a speed restriction is indicatedon the tire or the manufacturer rates the tire at 75 mphor above. (See Table C below.)Load limits at various speeds for radial plytruck-bus tires used on improved surfaces. (1)Exceeding the legal speed limit is neither recommended nor endorsed.B. CONVENTIONAL TIRESThe service load and minimum (cold) inflation must complywith the following limitations unless a speed restriction is indicatedon the tire or the manufacturer rates the tire at 75 mphor above. (See Table D below.)Radial Ply TiresSpeed Range % Load Change Inflation Pressure(mph)Change71 thru 75 -12% +5 psi66 thru 70 -4% +5 psi51 thru 65 None No increase41 thru 50 +7% No increase31 thru 40 +9% No increase21 thru 30 +12% +10 psi11 thru 20 +17% +15 psi6 thru 10 +25% +20 psi2.6 thru 5 +45% +20 psiCreep thru 2.5 +55% +20 psiCreep (2) +75% +30 psiStationary +105% +30 psiNote: For bias ply tires please consult the TRA Year Book.Radial Ply TiresSpeed Range % Load Change Inflation Pressure(mph)Change71 thru 75 -12% +5 psi66 thru 70 -4% +5 psi51 thru 65 None No increase41 thru 50 +9% No increase31 thru 40 +16% No increase21 thru 30 +24% +10 psi11 thru 20 +32% +15 psi6 thru 10 +60% +30 psi2.6 thru 5 +85% +30 psiCreep thru 2.5 +115% +30 psiCreep (2) +140% +40 psiStationary +185% +40 psiLoad limits at various speeds for radial ply truck-bus tires,rated at 75 mph or above, used on improved surfaces. (1)C. METRIC AND WIDE BASE TIRESRadial Ply TiresSpeed Range % Load Pressure Inflation Pressure(mph)Change71 thru 75 None No increase66 thru 70 None No increase51 thru 65 None No increase41 thru 50 +7% No increase31 thru 40 +9% No increase21 thru 30 +12% +10 psi11 thru 20 +17% +15 psi6 thru 10 +25% +20 psi2.6 thru 5 +45% +20 psiCreep thru 2.5 +55% +20 psiCreep (2) +75% +30 psiStationary +105% +30 psiD. CONVENTIONAL TIRESRadial Ply TiresSpeed Range % Load Pressure Inflation Pressure(mph)Change71 thru 75 None No increase66 thru 70 None No increase51 thru 65 None No increase41 thru 50 +9% No increase31 thru 40 +16% No increase21 thru 30 +24% +10 psi11 thru 20 +32% +15 psi6 thru 10 (3) +60% +30 psi2.6 thru 5 (3) +85% +30 psiCreep thru 2.5 (3) +115% +30 psiCreep (2)(3) +140% +40 psiStationary (3) +185% +40 psiAppendix(1) This information does not apply to off-road tires.(2) Creep – Motion for not over 200 feet in a 30-minute period.(3) Apply these increases to dual loads and inflation pressures.Note 1: The inflation pressures shown in the referenced tables are minimum cold pressures for the various loads listed. Higher pressures should be used as follows:A. When required by the above speed/load table.B. When higher pressures are desirable to obtain improved operating performance.Note 2: Load limits at various speeds for:Tires used in highway service at restricted speed.Mining and logging tires used in intermittent highway service84