Method of mounting tires to civil engineering vehicles and associated tire

A method for fitting tires to driving axles of a vehicle carrying heavy loads on one of type A route where the vehicle ascends under load with a driving torque and descends empty with braking torque and type V route where the vehicle ascends empty and descends under load with a braking torque, said method comprising:

• choosing tires for said vehicle, these tires having a tread of a maximum width L and an outer surface forming a rolling surface the tread comprising:
• a median portion having a width between 20 and 50% of the width L of the tread;
• and
• edge portions on axial sides of the median portion, the edge portions each comprising a plurality of relief elements defining a plurality of first transverse grooves extending transversely to a circumferential direction of the tire, each of the first transverse grooves being delimited by a first and a second rubber face, the first rubber face being inclined relatively to a median plane perpendicular to the rolling surface with an angle α different from an angle of inclination β of the second rubber face relative to the median plane;
• determining a type A route or a type V route to be taken by said vehicle;
• when the route is of type A, fining the tires to the driving axles such that for each of the first transverse grooves in the edge portions of the tread, one of the rubber faces has a smaller angle of inclination and comes into ground contact before the other one of the rubber faces does;
• and
• when the route is of type V, fitting the tires to the driving axles such that for each of the first transverse grooves in the edge portions of the tread, one of the rubber faces has a larger angle of inclination and comes into ground contact before the other one of the rubber faces does.