Recommendations for choosing tires (Chevrolet Tahoe 2)

When choosing tires, pay attention to the marking. The geometric dimensions, load capacity and maximum speed must strictly comply with the manufacturer's recommendations. The landing diameter of the selected tire must correspond to the landing diameter of the disk.

There are several types of tires: road, universal (all season), winter, high cross-country ability. The type of tires is selected based on operating conditions.



When replacing 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.

Using any other size or type of tire may seriously affect handling, comfort, speedometer/odometer accuracy, ground clearance, fuel economy, tire clearance or tire chain clearance.

Warning: Do not mix radial and bias tires. This may cause dangerous vehicle behavior, leading to loss of control.

The marking may contain one of the following designations:



275 - nominal profile width, expressed in millimeters. This size is specified by the manufacturer.

Note: in the marking of American-made tires, the conventional section width is expressed in inches. For example, a possible marking is 7.50R16-6PRLT, where the conventional section width is 7.50 inches.

70 - the ratio of the height of the tire profile to its width, expressed as a percentage (%),

= H/W x 100%

If this designation is absent, the ratio is 0.80...0.82. This size must correspond to the tire size recommended by the manufacturer.

R - designation of radial tire;

B - designation of diagonal tire. Radial and diagonal tires differ in the arrangement of the cord threads. Radial tires have lower rolling resistance and a longer service life compared to diagonal tires.

16 - tire seat diameter, expressed in inches. This size is selected based on the table "Tire markings and tire pressure" and must correspond to the tire size recommended by the manufacturer.

112 - conditional load-carrying capacity index. It is selected based on the table "Tire load-carrying capacity indices".

Table. Tire load indexes

Index	Load, kg	Index	Load, kg
84	500	96	710
85	515	97	730
86	530	98	750
87	545	99	775
88	560	100	800
89	580	101	825
90	600	102	850
91	615	103	875
92	630	104	900
93	650	105	925
94	670	106	950
95	690	107	975

S - tire speed index. It is selected based on the table "Tire speed indices".

Table. Tire speed indices

Speed index		Maximum speed, km/h
L		120
R		150
Q		160
R		170
S	SR	180
T		190
U		200
H	HR	210
V		240
	ZR	more than 240
W		270
Y		300

When marking tires, optional designations may be used:



6PR - ply rating, a conventional value indicating the load-bearing capacity of the tire, that is, the strength of its carcass (4PR - tires for passenger cars, 6PR and 8PR - tires for light trucks and minibuses).

Symbols used for marking tires of American manufacture:

LT - indicates the area of application, in this case for SUVs, small trucks and minibuses; R - tire for passenger cars.

(The original text can be found on the website «CHEVYMAN.RU»)