Aerospace Cycling

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What Do The Speed Rating Letters On Tires Mean

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. A tire’s certified speed rating is given a letter from A to Z, ranging from 5km/h (3mph) to above 300 km/h (186 mph).

What is H or V rating on tires?

H-rated tires are rated for a maximum speed of 130 mph. The V rating is the next rating faster, and V-rated tires are good to 149 mph. Both H- and V-rated tires are considered to be performance-touring tires.

Which is better T or H speed rating?

The T or H part of the code indicates the speed rating of the tires. A speed rating of T indicates that the tire can be safely driven up to 118 mph. A tire with an H rating has a higher limit — 130 mph — which means it can be safely driven faster than the tire with the 94T code.

What is speed rating C on tires?

The Tire Speed Rating Chart SPEED RATING Speed Symbol Speed (km/h) Speed (mph) C 60 37 D 65 40 E 70 43.

What is the S speed rating?

TIRE SPEED RATINGS SAFETY Speed Rating Maximum Speed S Up to 112 mph T Up to 118 mph U Up to 124 mph H Up to 130 mph.

Can I mix H and V rated tires?

Premium Member. There’s no problem mixing V & H as long as you don’t exceed the H ratings max speed.

How do you read a tire speed rating?

Speed rating is easy to locate because it’s usually the last item in the character sequence in the tire’s size code. For example in this tire code: “P205/60R16 82S,” S is the speed rating. To view the tire size code for your current tires, just look at the sidewall.

Does tire speed rating affect ride quality?

Speed Ratings Refer to More Than Just Speed Speed ratings affect more than just speed, they also contribute to ride comfort, wear, and cornering capabilities. In general, the higher the speed rating, the better the grip and stopping power, but the lower the tread life.

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).

What r means on tires?

R indicates the construction used within the tires casing. R stands for radial construction. B means belted bias and D stands for diagonal bias construction. 17 The last dimension listed in the size is the diameter of the wheel rim, which is most often measured in inches.

What does Zr mean?

ZR is a category of speed rating. It was first introduced for speeds over 150mph. Since then car speeds have increased beyond what was believed to be the maximum required. With cars capable of going faster than 150mph, ZR was subdivided into Y, W and the original Z.

What does M’s mean on tires?

149. All-Season Tires with Mud and Snow Designation. When a tire has M+S on it, that means that it meets the Rubber Manufacturers Association (RMA) guidelines for a mud and snow tire.

What does 124 l mean on a tire?

124 is the load range or weight capacity per tire at max. air pressure or in this case 3527 lbs. L is 75 mph speed rating and N is 87 mph. A 117 is generally a 10 ply tire.

What speed rating is L?

Letters ranging from L to Z identify the speed rating. The lowest rating, L, is 75 mph. The highest rating, Z, is 149+ mph. For more speed limits, please refer to speed rating Chart below for more detail.

Can I use ZR tires instead of R?

The Z in ZR corresponds to an old label used by manufacturers to indicate that the speed index is higher than V, i.e. 150 mph. Thus, a ZR tyre has a speed index of V, W, or Y. There is therefore no difference between a ZR or an R tyre with the same speed index.

What is the best tire speed rating?

Speed Rating L 75 mph Off-Road & Light Truck Tires T 118 mph Family Sedans & Vans U 124 mph H 130 mph Sport Sedans & Coupes V 149 mph Sport Sedans, Coupes & Sports Cars.

What does Utqg mean on tires?

No, “UTQG” is not a play dictated by Peyton Manning during a Super Bowl huddle. The Uniform Tire Quality Grade is a comparative assessment applied to most car tires (excluding winter tires) to help consumers make informed decisions. The manufacturers grade the tires themselves for temperature, traction, and tread wear.

What does 98H mean on a tire?

Hurry Up and Weight. The load index and speed ratings are grouped together, denoted, for example, as 98H. The load index is a number that generally ranges from 75 to 105; the higher the number, the more weight the tire can support.

What do the numbers and letters on tires mean?

The number is the load rating, or the amount of weight that it can handle. The letter is the speed rating, or the maximum speed the tire is built for. Consult a load and speed index to find out what your tire’s specific rating means.

What are the different speed ratings on tires?

What Is a Tire Speed Rating? The speed rating tells you the speed the tire can safely maintain over time. M — Up to 81 mph. N — Up to 87 mph. P — Up to 93 mph. Q — Up to 99 mph. R — Up to 106 mph. S — Up to 112 mph. T — Up to 118 mph.

What does BSW mean on a tire?

B, BLK, BW, BSW = Blackwall or Black Sidewall. W, WW, WSE = Whitewall or White Sidewall. XNW = Extra Narrow White Width.

What do the 3 numbers mean on tire size?

Tire Width Is the width of the tire measured in millimeters from sidewall to sidewall. The first three-digit number in the tire size refers to the tire width. For instance, in a size P215/65 R15 tire, the width is 215 millimeters.

Does tire speed rating really matter?

The speed rating tells you the speed the tire can safely maintain over time. A higher speed rating usually means you will have better control and handling at higher speeds – and that the tire can take the extra heat. As a general rule, tires with higher speed ratings also handle better at slower speeds.

What happens if you go over tire speed rating?

The speed rating is there to let you know that you shouldn’t exceed that speed with that tire. If you do for a sustained period of time the air in the tire will heat up and expand causing the tire to explode.