How to read tire speed rating and load index?
Tire Speed Rating Chart; Service description speed symbol Maximum speed (MPH) Size speed symbol; Q: 99: R: 106: S: 112: T: 118: U: 124: H: 130: V: 149: Above 149: ZR: W* 168: Y* 186: ZR (Y)** Above 186: Recommended Speed Rating
What is the difference between 95T and 95h tires?
Dec 19, 2019 · The numerical value found preceding the speed rating is referred to as the tire load index. It ...
What is tire load and speed rating?
In this page you will find tire speed rating chart with maximum speeds in MPH and KMH, tire pressure and also tire load adjustments for high speed driving. TirePressure.org. Home Converters Calculators Charts. Tire Speed Rating Chart
What is the best tire speed rating?
May 25, 2021 · A speed rating chart is used to indicate the standard maximum speed capacities for different ...
What is load and speed rating?
The load index number and speed symbol shown on a tyre correspond to the maximum load-carrying capacity of that tyre and its maximum speed capability. The load index number and speed symbol shown on a tyre correspond to the maximum load-carrying capacity of that tyre and its maximum speed capability.
What is H and V rated tires?
An “H” rated tire is designed to operate at a maximum speed of 130 mph. A “V” rated tire on the other hand is designed to operate at a maximum speed of 149 mph, almost twenty miles an hour more than the “H” rated tire.
Which is better T or H speed rating?
The “T” or “H” on tires pertain to their speed ratings. A T-rated tire can withstand top speeds of up to 118 mph (190 km/h), while an H-rated tire can support up to 130 mph (210 km/h). It is important to note these markings and stay within those speed limits.
What load rating is better E or F?
F-load range tires allow for higher carrying capacity at a higher inflation pressure compared to tires of the same size with an E-load range.
Can I use V instead of H tires?
A V-rated car requires a tire designed to operate to a maximum of 149 mph and can thus not be fitted with an H-rated tire. The speed rating system was developed to control the safe speeds at which tires must still perform as per the intended design.
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).
What is load range H?
From a G to an H Truck tires typically come in two load ratings: G and H. Load range G is a 14-ply configuration, while load range H tires have 16 plies. The heavier-rated tire will usually add between 700 pounds and 1,000 pounds more load-bearing capacity per tire (see "How Much is Too Much," next page).
Can you mix T and H 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 H mean on tires?
speed rating“H” represents the speed rating, which is how fast the tires can go based on their load capacity. This rating ranges from A – Z. “H” indicates a speed rating of up to 130 mph.
Do F rated tires ride rough?
Typically, an F rated tire will ride a bit worse than an E rated tire, but there are some exceptions. Load range refers generally to a side ply rating, while load index refers to a tire's weight rating.
Is Load Range E good for towing?
At a minimum, Load Range E tires are capable of safely supporting about 3,000 pounds. So, in the case of a dualie (six wheels), the tires collectively will provide more than sufficient grip for safely towing 18,000 pounds.
Is Load Range E better than D?
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 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.
What is the load index of a tire?
The load indexes of the tires used on passenger cars and light trucks, typically range from 70 to 110. The speed rating is indicative of the tire’s capacity to move at high speeds.
What does the number on a tire mean?
The numbers and letters engraved on a tire reflect, among other things, its load bearing and speed handling capacity. These are important specifications provided by the manufacturer, and are a part of that tire's rating. The numbers and letters engraved on a tire reflect, among other things, its load bearing and speed handling capacity.
What is an H speed rating?
An H speed rating is at the low end, or at the start of the performance tire speed ratings. H speed rated tires are ideal for sport and luxury coupes and sedans, but not typically considered full-fledged performance vehicles. H speed ratings are common in the grand touring all-season tire category. W.
What is the speed rating of a tire?
An H speed rating indicates the tire is approved for speeds up to 130 mph (210 km/h) under optimal conditions. An H speed rating is at the low end, or at the start of the performance tire speed ratings. H speed rated tires are ideal for sport and luxury coupes and sedans, but not typically considered full-fledged performance vehicles. H speed ratings are common in the grand touring all-season tire category.
What is a T rating?
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 does a W mean on a car?
A W means the tire is approved for speeds up to 168 mph (270 km/h) under optimal conditions. W speed rated tires land firmly at the performance end of the speed rating spectrum. Ws are suitable for performance coupes and sedans, and even street driven exotic sports cars.
What does a Y rating mean on a tire?
Y rated tires have been tested at speeds up to, and in excess of, 186 mph (300 km/h) under optimal conditions. If Y speed rating is indicated without parentheses (as normal), this means the tire is rated up to 186 mph. If the Y speed rating is indicated inside of parentheses, this means that particular tire size and specification has been tested at speeds in excess of 186 mph. A Y speed rating denotes maximum tire performance.
How fast can a Q tire go?
Q tires are approved for speeds up to 99 mph (160 km/h) under optimal conditions. Tires toward the low end of the speed rating range often prioritize a particular function or unique performance over maximum speed rating. Some studdable and studless winter tires, for example, are Q speed rated.
What Is Tire Speed Rating?
A tire’s speed rating indicates the optimal speed that the tire can safely maintain over time. In short, it’s the fastest speed a tire can handle before it no longer performs as designed. The higher the speed rating, the better control and handling you’ll have at higher speeds.
Why Were Tire Speed Ratings Developed?
The speed rating system used today was developed in Europe in response to the need to control the safe performance of tires at standardized speeds. When the rating system was originally developed, the "Unlimited V" category of over 210 km/h (130 mph) was the top speed rating possible.
Where Can I Find My Tire Speed Rating?
You can find your tire speed rating in a number of places, typically in the owner’s manual, driver’s side doorjamb, glove box door, and gas tank hatch. Recent standardization has changed so all ratings except "Unlimited ZR" incorporate the speed symbol and load index as part of every tire’s service description on the tire’s sidewall.
ZR Designation
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. Below are examples of tire sizes with a “ZR” speed rating.
Tire Speed Rating Chart
For tires with a maximum speed capability higher than 240 km/h (149 mph), a "ZR" may appear in the size designation. Tires with a maximum speed capability higher than 300 km/h (186 mph), require a "ZR" in the size designation. Consult the tire manufacturer for maximum speed when there is no service description.
Turn to Tires Plus for Help
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