Often asked: What Is Load Index Rating On Tires?

What is a good load index for tires?

A tire with a lower load index than the Original Equipment tire indicates the tire does not equal the load capacity of the original. Typically, the load indexes of the tires used on passenger cars and light trucks range from 70 to 126.

What does 120 load index mean on tires?

For example, a light truck tire with a load index of 120/116 means a load capacity for a single tire of 3,086 pounds and a load capacity of 2,756 pounds for two tires. The reason the capacity for two tires is lower than a single tire is to make sure that the vehicle can continue to carry the load should one tire fail.

What is load index and speed rating for tires?

The load index indicates how much weight a tire can safely carry at maximum air pressure, and the speed rating represents the maximum operating speed.

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What does the T or H mean on tires?

All these ratings cover speeds well above legal limits. The most popular, S, T, and H, are rated for 112, 118, and 130 mph, respectively. Traditionally, most family cars have used S- and T-rated tires, while tires rated H and higher have mostly been available only in sports cars or upscale sports sedans.

Is a higher load index better?

The higher the tire’s load index number, the greater its load carrying capacity. Typically, the load indexes of the tires used on passenger cars and light trucks range from 70 to 130.

Does tire load index affect ride?

Within the load index of a specific tire, one adjusts the tire pressure to achieve the desired load capacity; that tire pressure will also affect ride comfort and wear patterns on the tread (too high a pressure, and the tread will wear faster in the middle than at the side; too low a pressure, and the tread will wear

What is a 121 load rating?

The load rating of the tire displays the weight a tire can carry. The product of the load capacity of a single tire and the number of tires determines the load carrying capacity of all the tires combined. The rating of 121 shows that it has a load capacity of 3297LBS.

What’s better load range D or E?

For a given brand and size tire, the load range E has a higher maximum load capacity than the load range D. The E tire is built and rated for 80 psig, while the D tire is (as I recall) built and rated for 65 psig maximum inflation pressure.

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Do XL tires ride rough?

The XL tires have a stiffer sidewall and will ride a bit more ‘rough‘. Probably will respond quicker too as they have stiffer sidewalls.

What does 121 118R mean on tires?

90S, 95T, 121/118R, etc. These digits after the tire size, 90S in this example, are the “load index” and “speed rating”. That just means that the maximum pressure on one tire is higher than the other. However, this again is only at maximum pressure which is more than you would usually use.

Should I get V or H rated tires?

To support running at higher speeds, Vrated tires will have a stiffer sidewall and slightly firmer ride than Hrated tires. For normal driving conditions the Hrated tire will provide a more comfortable ride and the Vrated should give slightly better handling.

What does Q mean on a tire?

Tires with a Q speed rating can safely sustain speeds of up to 99 miles per hour. The tire may be able to reach higher speeds, but going faster than 99 mph for any length of time is not safe. The tire is not designed to handle the stresses.

Which is a higher speed rating H or T?

H rated tires have stronger construction than T rated tires. The concern may not be speed although a Subaru can exceed 118 MPH hence those tires however it may be load rating of the tires. Lessor speed rated tires must be able to handle the listed load of your vehicle properly. Confirm this, a good tire shop will.

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What does speed rating t mean for tires?

T. A T rating indicates the tire is approved for speeds up to 118 mph (190 km/h) under optimal conditions. T ratings are most associated with standard touring tires, and everyday passenger vehicles like family sedans and minivans.

What is the highest speed rating for a tire?

Tires having a maximum speed capability over 149 MPH may have “ZR” in the size designation. Tires with a maximum speed capability over 186 MPH are required to include “ZR” in the designation.

ZR Designation.

EXAMPLES
Tire Designation Maximum Speed
P275/40ZR17 93W 270 km/h (168 mph)
P275/40ZR17 93Y 300 km/h (186 mph)

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