Tire Speed Rating Chart
Service description speed symbol | Maximum speed (MPH) |
Q | 99 |
R | 106 |
S | 112 |
T | 118 |
Full Answer
How to read tire speed rating and load index?
What are the different speed ratings?
- L
- M & N. An M indicates the tire has been approved for speeds up to 87 mph (140 km/h) and an N is approved for speeds up to 81 mph ...
- P. A P indicates the tire has been approved for speeds up to 93 mph (150 km/h) under optimal conditions.
- Q. Q tires are approved for speeds up to 99 mph (160 km/h) under optimal conditions. ...
- R. ...
- S. ...
- T. ...
- H. ...
- W. ...
- V. ...
What is tire speed and load rating?
Tire speed ratings are set by the tire manufacturers and are an indication of the tire’s maximum speed capability in ideal conditions. The tire load index rating communicates how many pounds a tire can safely carry. Put together, they make up the service description. Knowing this service description information is highly recommended whenever you’re replacing Original Equipment (OE or factory) tires.
What is the load index and speed rating for tires?
Typically, the load indexes of the tyres of passenger cars and light trucks range from 70 to 110. The speed rating of a tyre indicates the maximum speed at which the tyre can be driven safely under its approved load capacity. You must use tyres with the right speed rating without which you would be putting lives at risk.
What is the best tire speed rating?
You can glean a bit of info from the tires by reading this rating:
- 500 - The durability rating of a tire, compared to a control tire with a treadlife of 100. ...
- A - This is the Traction rating of a tire, which indicates how well a tire stops in wet conditions. ...
- A - The second letter in the UTQG is the Temperature rating, which indicates how well a tire holds up to extreme heat. ...
What does load speed rating mean?
The tire speed rating is the maximum speed tires can safely carry a load (the original weight of your vehicle plus whatever's in it) for a sustained amount of time in ideal conditions. The speed rating sits alongside the load index on the side of every tire.
What is a load rating chart?
Using the Tire Load Index Chart In other words, it's the amount of weight your tire can support safely. For example, if a tire has a load index of 92, it can support 1,389 pounds at maximum air pressure. Multiply that by four tires (4 x 1,389 = 5,556 pounds) to get your car's maximum load carrying capacity.
What load range is e?
Light Truck Tire Load RangesAbbreviationMeaningMax Load PressureLR/CLoad Range C - 6 ply rated50 psiLR/DLoad Range D - 8 ply rated65 psiLR/ELoad Range E - 10 ply rated80 psiLR/FLoad Range F - 12 ply rated95 psi1 more row
Should I get H or V rated tires?
If you feel the need to drive at or above 130 mph then you should get a “V” speed rated set of tires. If you don't plan on driving that fast, then an “H” speed rated set is the better option.
What load rating do I need?
To roughly determine the load range capacity for each individual tire, take the vehicle's gross weight and divide by four. If the vehicle gross weight is 4,500 pounds, each tire should be able to safely support at least 1,125 pounds.
What's better load range D or E?
Expert Reply: Load range D has a capacity of 1,220 lbs at 65 psi, whereas load range E has a capacity of 1,520 lbs at 80 psi. Basically the only difference between the two is the weight capacity.
What is better Load Range C or E?
The load C tires have softer sidewalls and provide a more comfortable ride both on road and off road. The E rated tires have stiffer sidewalls and are more suited for towing or loading the pickup bed with heavy loads.
Are all Load Range E tires 10 ply?
To summarize: ply ratings and load ratings are systems of measurement for load carrying capacity. Load Range E tires are equivalent to a 10-ply tire.
Which is better Load Range C or D?
Expert Reply: The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity.
What are Z rated tires?
A “Z” rating can mean different things. While it nearly always means a high performance tire for high-performing sports cars, “Z” may actually appear in the middle of a tire's size information. When it does, it represents either a maximum speed of more than 149 mph (240 kph) or 186 mph (300 kph).
How fast can H-rated tires go?
to 130 mphTIRE SPEED RATINGS SAFETYSpeed RatingMaximum SpeedUUp to 124 mphHUp to 130 mphVUp to 149 mphWUp to 168 mph19 more rows
Can I mix H and V rated tires?
Just remember, never mix and match tires with different speed ratings on your vehicle. This will cause major problems with the handling of your vehicle. If tires of different speed ratings are mounted on a vehicle, the lower speed-rated tires should be placed on the front axle, regardless of which axle is driven.
What does speed rating mean on tires?
What Does Tire Speed Rating Mean on Tires? The durability of a tire varies depending on the tire’s speed rating, which refers to the maximum speed a tire can safely carry the vehicle’s weight and payload in ideal conditions. Tire speed ratings come in the form of a letter that follows the load index value of the tire.
How is a tire speed rating determined?
A tire’s speed rating is determined by putting the tire through a series of tests using a specifically designed machine. The goal is to meet or surpass the Economic Commission for Europe (ECE) standards. Some tires even undergo more rigorous tests to comply with the Society of Automotive Engineers (SAE).
What is the difference between 65 and 17?
Using the same example above, 65 is the aspect ratio of the tire while 17 is the tire diameter (in inches). Aspect ratio, also known as the tire profile measurement, indicates the thickness of the sidewall from the rim to the outside tread of the tire. The 65 value means the tire has 65% of the section width.
What temperature do tires need to be inflated?
Tests are performed inside a room that is heated to a temperature of 77 degrees Fahrenheit.
What does 65 mean on a tire?
The 65 value means the tire has 65% of the section width. Tire or wheel diameter is the overall measurement of the tire from two opposing outer tread points. The letter in between the aspect ratio and tire diameter refers to the internal construction of your tire.
The Science Behind Your Drive
Learn more about important specifications like speed rating and load index.
Speed Rating
Tire speed rating tells you the maximum service speed for a tire. A speed rating isn't, however, a recommendation to exceed speed limits, and doesn't indicate how well a tire handles or corners.
Load Index
Tire load index is an assigned number that corresponds to the maximum weight that a tire can support when properly inflated. The higher the tire's load index number, the greater its load carrying capacity.
Load Index & Speed Rating Charts
This code, when present, appears after the size marking. The code comprises three characters, two numbers and a letter, e.g. 67 H, known as a service description. The two-digit number is a code for the maximum load carrying capacity of the tire.
Tire Conversion Charts
Size Conversion Tables: Use these tables to convert your older style inch size to the new metric sizing.