Table. Correspondence of tire sizes to the parameters of wheel disks and tire pressure.
Note: () - at the maximum load of the car.
Tires come in several types: road, universal (all season), winter, off-road.
The type of tires is selected based on the operating conditions.
Tire sizes.
D - outer diameter,
d - landing diameter of the wheel rim,
H - tire profile height,
W - profile width.
When changing tires, use only tires of the same size and design as the recommended tires for your vehicle and with the same or greater load capacity.
The use of tires of any other size or type can seriously affect handling, comfort, speedometer/odometer accuracy, ground clearance, fuel economy, distance between the body and the tire or snow chain.
Attention: do not mix radial and diagonal tires. This can cause the vehicle to behave dangerously, leading to loss of control.
One of the following designations is possible in the marking:
175 - conditional profile width, expressed in millimeters. This size is set by the manufacturer.
Note: US-made tires are labeled with nominal section widths in inches. For example, a possible marking is 7.50R16-6PRLT, where the nominal profile width is 7.50 inches.
60 - the ratio of the height of the tire profile to its width, expressed as a percentage (%),
If this designation is absent, then the ratio is 0.80... 0.82.
This size is selected based on the table "Correspondence of tire sizes to wheel disk parameters and tire pressure", and must match the tire size recommended by the manufacturer. R - designation of the radial tire; B - designation of a diagonal tire. Radial and bias tires differ in the arrangement of the cords. Radial tires have lower rolling resistance, longer life than bias tyres.
14 - tire diameter, expressed in inches. This size is selected based on the table "Correspondence of tire sizes to wheel disk parameters and tire pressure", and must match the tire size recommended by the manufacturer.
79 - conditional index of carrying capacity. It is selected based on the table "Tire load indexes".
Table. Tire load indexes.
B - tire speed index. It is selected based on the table "Tire speed indices".
Table. Tire speed indexes.