Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. Z speed-rated tires originally reflected the highest tire speed rating - i. 25 & 2. As manufacturers continue to add speed to their vehicles, tire speed ratings evolve to match the speeds. For instance, a 2022 Chevrolet Trailblazer LS comes with 225/60R-17 99H tires. However, most tires for consumer use are at least S-rated, indicating a maximum driving speed of 112 mph (180 km/h). T 190 km/h. On the sidewall of every tire, you'll find one of these speed rating codes: M — Up to 81 mph. The “94” denotes the Load Index, indicating the tire can carry a maximum load of 670 kg (1,477 pounds). Check the chart below:The higher speed tire has to dissipate more heat, thus the sidewalls are made thinner. The speed rating is another essential part of your tire’s performance. Speed ratings are based on a new tire’s performance in lab testing conditions, not your typical roadways. The V-rating means that the tire has a maximum speed capability of 149 mph, while the H-rating indicates a maximum speed capability of 130 mph. H: Maximum Speed – A tire that has this rating is capable of running at up to 130 miles per hour (or 225 km/h). These alphanumeric codes might look cryptic at first, but they convey valuable information. The tyre speed rating will be the final letter, found after the wheel size details. But in terms of speed, the 105W tire, with a speed rating of 270 km/h, leaves the 105H tire, with its 210 km/h speed rating, in the dust. The tire comes with a W speed rating and fits wheels ranging from 17 inches to 24 inches in diameter. Besides, you can also encounter H and T tires on the market. 0 1. and the highest rating currently (Y)= above 186. That particular character corresponds to a maximum speed of 130. It is represented by a letter code (e. What speed rating is Zr? SPEED RATING SPEED SYMBOL SPEED (mph) ZR* W 168 Y 186 (Y) Above 186. This is because UK tyre speed ratings are based on European Union-wide limits, and mainland Europe measures. T - Up to 190 km/h. High-performance vehicles such as sports cars will come fitted with tyres with higher speed ratings, such as W, Y or (Y). The speed rating is what determines how fast a tire can go before it tears itself apart. I understand that the speed rating is a 10min test (sustained speed at fixed temp) although most tyre manufactures will over design. They range from “L,” which dictates a maximum speed of 75 mph, to “ (Y),” which is for speeds in excess of 186 mph. You will see the actual speed rating at the end of the 92Y indicator. . For tires having a maximum speed capacity above 300 km/h. It has a top speed of 118 mph. H speed rating. V rated tires are designed to handle speeds of up to 149 mph or 240 km/h. W-rated tires are designed to handle speeds up to 168 miles per hour, while V-rated tires can manage rates up to 149 miles per hour. The lowest ratings are. Some tires have speed ratings of W, 168 mph and Y, 186 mph. The. W is 168 miles per hour. Y-rated tyres are rated in excess of 186mph. Max Speed (mph & km/h) Q: 186 mph & 300 km/h: S: 112 mph & 180 km/h: U: 124 mph & 200 km/h: V: 149 mph & 240 km/h: Y: 186 mph & 300 km/h: R: 106 mph & 170 km/h: T:. * W- and Y-speed ratings are subcategories of the Z-speed rating. Speed Rating W. T Speed Rating: Max speed limit of 90 mph. 8/5. Nowadays, it means 149 mph but no higher. The split siping design is also designed to improve wet and dry traction while the enhanced block rigidity is responsible for improving the steering stability and high-speed cornering of your ride. These alphabets are assigned to indicate the maximum speeds a tire can be driven on ideally. The speed rating denotes the maximum speed at which a tire can safely operate. For S-speed-rated tires, it's 112 mph; for T, 118 mph. Speed Designation: Maximum Speed Rating: N: 87 mph: P: 93 mph: Q: 99 mph: R: 106 mph: S: 112 mph: T: 118 mph: U: 124 mph: H: 130 mph: V: 149 mph: W: 168 mph: Y: 186 mph: Z: 149+ mph: Load rating: 85V. This tire comes with a 25,000-mile warranty. When it was first established, the Z speed rating was the highest rating and was assumed to be the highest speed rating that. Explore the true capabilities of the Michelin CrossClimate 2 tire. Its rated for up to 118 mph. On the sidewall of every tire, you'll find one of these speed rating codes: M — Up to 81 mph. We would like to show you a description here but the site won’t allow us. Seven more sizes are in development. At one time, the maximum speed a tire could have, aVa, was a maximum of 240 km/h (149 mph) or more. Representing maximum driving speed for this tire, based on the manufacturer’s recommendation. N 140km/h Spare Tyre. Facebook. • T - up to 118 mph. You can safely put tyres with a higher speed rating on your vehicle. W Speed Rating. A more recent development is a tire with a (Y) rating, which is given to a tire that can withstand high speeds past the 186-mph mark. For S-speed-rated tires, it's 112 mph; for T, 118 mph. Here’s a quick reference to standard tire speed rating codes. Tire Speed Rating Z. S 180km/h Family Sedans & Van Tyres. Speed Rating H As mentioned above, the “H” speed rating does not appear after “G” but instead between “U” and “V”. The new Supermax UHP-1 all-season ultra-high performance tire from Horizon Tire Inc. Same with VINs, no O/Q/0 or I/1. 92h on a tire means the speed that the tyre is legally approved for. H (Speed Rating): A speed rating of “H” means that this tire is designed to withstand speeds up to 130 miles per hour. So if the Z rating is still used, it must be in conjunction with the W as. For this reason, the wheel rim size (R) is also multiplied by 25. The “H” speed rating says that the tire would give a frequency of 130mph. H-rated tires: Ideal for sporty sedans and coupes with a maximum speed of 130 mph (210 km/h) V-rated tires: Suitable for sports cars and luxury sedans with a maximum speed of 149 mph (240 km/h) W-rated tires: Designed for high-performance vehicles with a maximum speed of 168 mph (270 km/h)With a maximum speed of 118 mph190km/h, you usually find tires with speed rating “T” on family sedans and minivans. 130 mph & 210 km/h. The most common speed ratings are: -S: Up to 112 mph (180 km/h) -T: Up to 118 mph (190 km/h) -U: Up to 124 mph (200 km/h) -H: Up to 130 mph (210 km/h) -V: Up to 149 mph (240 km/h) -W: Up to 168 mph (270 km/h) To check your tire’s speed rating, simply look for the letter code on the sidewall of the tire. Here, the tire speed rating is V. Beyond that, the tire's performance, particularly its heat dissipation, could be compromised. If the tire is able to resist heat better, it usually means. Q: The max speed for this type of tire is about 99 MPH. K: 110 kph 68 mph. , in excess of 149 mph. S - Up to 180 km/h. Only worry about the speed rating unless it's very low, or you plan on tracking your car and getting it to very high sustained speeds. In 2004 she was refitted with two V-12 Electro-Motive Division (EMD)12-645F7B diesels rated at 2,550 hp (1,900 kW) each. Some low-speed tires are rated as A1 – A8 –, but these have significantly low-speed ratings. Contents [ show ]To determine the speed rating of your car’s tyres, check the sidewall of the tyres. W speed rating: 168: Exotic sports cars: Y speed rating: 186: Exotic sports cars (Y) speed rating: 186+ Exotic sports cars: You might wonder why tire speed rating H is out of order, situated between U and V? Before 1991, according to a Wikipedia entry about tire codes, the letter H stood for "high performance," with a speed rating of 130 miles. To further add to (and possibly confuse) the code of reading tires, there are also speed ratings denoted by letters. PREMIUM STANDARD TOURING ALL-SEASON. R 170km/h 4×4 & Bakkies Tyres. Maybe it's time for me to step in an explain the difference between an T speed rated tire and a H speed rated tire. • S - up to 112 mph. Choosing tyres with appropriate speed ratings is essential to ensure safe and reliable performance. So why is it important to choose a tire with the correct speed rating? If you drive too fast on a tire with a lower. U 200km/h Sedans & Coupe Tyres. Tire speed ratings, represented by letters like H and V, indicate a tire’s maximum safe operating speed. Over time, they added ratings, and so did us Americans. • H - up to 130 mph. H-rated tires have a maximum speed capability of 130mph. 2019 Porsche Macan. 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. SHOP. ) 100 100 100 100 100 100 V-Speed Rated Sizes: Maximum Speed (mph) 100 106 112 118 124 130 136 143. That particular character corresponds to a maximum speed of 130. V is 149 miles per hour. The speed rating of your vehicle’s tyres can be found on the sidewall of the tyre. Some tires have speed ratings of W, 168 mph and Y, 186 mph. ’. 300. Z Speed Rating: Max speed limit beyond 240 mph. These alphabets are assigned to indicate the maximum speeds a tire can be driven on ideally. V means that vehicles can safely use the tire with a top speed higher than 149mph. They're useful to help compare load carrying capacity of different-sized tires, and as you might expect, the higher the tire's load index number, the greater its load carrying capacity. Meanwhile, it’s 168 mph for a W-speed-rating tire. There's a group of letters and numbers on the side. They’ll cost more for no benefit. A 109V tire can safely hit speeds up to 149 mph (240 km/h), while the 109H is a tad more modest, maxing out at 130 mph (210 km/h). In earlier incarnations of the speed rating system, “H” stood for “high performance,” which is why it maintains an unusual position in the speed rating spectrum today. The Bridgestone Turanza Serenity Plus has a V speed rating, UTQG 600AA and 12/32" tread for a few dollars less. For example, let’s consider the following code: 225/50R17 94W. FAQs. --Tobias. H is the speed rating. ”. For instance, a tire code can be 207/55R/06/91V. As mentioned above, the “H” speed rating does not appear after “G” but instead between “U” and “V”. Now, let’s decode ‘102H. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. P — Up to 93 mph. Common speed rating letters for the right tire include S, T, H, V, W, Y, and Z. The letter W denotes the maximum speed rating, which translates 168 mph—not something intended for mom's minivan. While both have the same load index of ’82’, meaning they can carry up to 475 kg (1047 lbs), the speed rating is different. There are no “I”, “O”, and “X” ratings. Tires with an H or V rating are regarded as performance touring tires. Here’s a list of some common speed ratings and their maximum speeds: S – 112 mph (180 km/h) T – 118 mph (190 km/h) H – 130 mph (210 km/h) V – 149 mph (240 km/h) W – 168 mph (270 km/h) Y – 186 mph (300 km/h) There are other speed ratings as well, but these are the most common ones you’ll encounter for passenger cars and trucks. Q — Up to 99 mph. Let’s break these ratings down in an easy-to-reference table:. Y 186. The main difference between H and V ratings is the tempo. The letter in a speed rating represents a maximum speed based on a standard chart (seen below). A 91H tire is rated for speeds up to 130 mph (or 210 km/h), while a 91W tire has a higher speed rating, allowing for speeds up to 168 mph (or 270 km/h). Performance, high performance, and ultra-high performance tires range in speed ratings of H (up to 130 mph), H-V (up to 149 mph), and V-Y (up to 186 mph), respectively. In comparison, V-rated ones extend the performance of tires up to 149 mph. The speed symbol located on your tire indicates the maximum speed capability of the tire when properly loaded and inflated. All season tires Ratings. Not so simple, the original equipment tire is the Bridgestone Turanza EL400-02 with a H speed rating, UTQG rating 300AA and tread depth 11/32". shrimps/prawns, krills, coleoids, etc. * W- and Y-speed ratings are subcategories of the Z-speed rating. To receive its rating it must demonstrate that it can sustain a particular speed when tested with simulated loads. Table of Contents. A tire’s certified speed rating is given a letter from A to Z, ranging from 5km/h. F: 80 kph 50 mph. If the mph speeds assigned to each speed rating. For S-speed-rated tires, it's 112 mph; for T, 118 mph. 168 mph. The ’95’ signifies a load index of 95, meaning the tire can bear up to 690 kg of weight. SIZE RANGE: 15" – 18" UTQG: 760 A A SPEED RATING: T & H186. The speed rating is another essential part of your tire’s performance. Never mix speed ratings. An H tire’s maximum pace operating under favorable circumstances is approximately 130 mph. A: In addition to H and V, there are various other speed rating categories such as T, S, W, and Y. Some tires have speed ratings of W, 168 mph and Y, 186 mph. Both 97T and 97H can carry the same load, but the 97H can handle higher speeds (130 mph) compared to the 97T (118 mph). For instance, a 2022 Chevrolet Trailblazer LS comes with 225/60R-17 99H tires. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. So as more manufacturers produce tires that can handle speeds above 149mph but still top speed at some point,. The typical speed ratings are S, T, H, Y, U, W, and V. 2K engine cars will do a true top speed of 175KPH, the Apollo tyres fitted as OE are T rated which is good for 190KPH. The speed rating is always indicated on the tire itself, right after the size information. This is more than adequate for most day-to-day driving conditions. The Bridgestone Turanza Serenity Plus has a V speed rating, UTQG 600AA and 12/32" tread for a few dollars less. The V rating is theoretically even safer because the safety margins at 85 would be larger, but almost every SUV and truck on the road is running H rated or even lower for those beefy all terrains (they're often T rated, 118). In this case it’s a V rated tyre this indicates the speed rating. The speed ratings are established by engineers who run the tyres in ten-minute increments until the desired speed has been met. These speed ratings are based on laboratory tests conducted by the engineers who run the tyre at about 10 km/hr steps, in 10-minute increments, until the requisite speed has been met. You can see it has been years now people drove cars at this speed on average. P 150km/h Winter 4×4 Tyres. Tires with T speed ratings can withstand maximum speeds of 118 mph or 190km/h, while H-rated tires can support top speeds of 130 mph or 210km/h. 225/50R16 89S. Can V-Rated Tires Go Faster than H-Rated Tires? V 149. H-rated tires can carry up to 1,300 pounds per tire, while V-rated tires can carry. The speed rating sits alongside the load index on the side of every tire. and the highest rating currently (Y)= above 186. In other words, it’s the fastest speed a tire can handle before it does not perform as designed. For example, Z was the highest rated speed at 149-plus until W and Y were used to match the higher speeds. “92” is the load index which indicates that the tire can carry a maximum load of 630 kg when properly inflated. Confusingly, W-rated tyres are rated at a higher speed in excess of 168mph. V Is for Very High Speed. Some tires have speed ratings of W, 168 mph and Y, 186 mph. These beauties are built to last for an extended period. V Speed Rating: Max speed limit of 240 mph. There are no “I”, “O”, and “X” ratings. The “T” is the Speed Rating, signifying the tire can safely reach speeds up to 118 mph (190 km/h). • T - up to 118 mph. H-rated tires are approved for speeds up to 130 mph (210 km/h). You can find out more about this in the table below. H-rated tires have a maximum safe speed limit of up to 130 mph (210 km/h). Today’s speed rating system uses letters A through Z. 0 1. 2 mph steps in 10-minute increments until the required speed has been met. The letters – h, r, v, w, t, y, s, and q – represent the Speed Rating, a measure of the maximum speed the tire can handle. It means that your tire can safely handle speeds up to 270 km/h (168 mph). (Y) 189. Z is over 149 miles per hour. Speed ratings are given letters, and each letter represents a speed between 75-186 mph. Therefore, W-rated tires have a higher top speed rating than V-rated tires. In other words, if a tire is rated “S”, then the tire will perform for an extended period of time at 112 mph and, although it won’t break apart the instant you hit 113 mph, it’s not recommended to sustain speeds higher than 112 mph. 50 as the first number (section width in inches) are rated for no more than. Typically, the Z, W and Y ratings appear on summer tires or competition tires commonly found on sports cars, tuners, exotic cars and other vehicles built for thrilling UHP performance. For instance, when you see 94T, this means that the load rating is 94 and the T indicated is the speed rating. U is 124 miles per hour. A V-speed-rated tire is one that can comfortably endure speeds up to 149mph or 240kph. In this article, we’ll provide an overview of speed ratings, delve into the characteristics of H. 0 Load Capacity (% of max. – Speed Rating W The “W” speed rating has recently become part of the tire speed chart and indicates a maximum speed capacity of 168 mph (270 kph) and. Tyre speed ratings are typically represented by a letter code that appears after the tyre size. H-rated tires can handle a maximum speed of 130 mph, while V-rated ones are good for up to 149. The Ultramax AS features 4 wide circumferential grooves to help channel water away quickly and efficiently delivering excellent wet weather traction. N — Up to 87 mph. The W rating replaced what was once Z, which was anything above 149 at the time, and is now limited to 168 mph. For example, in the size code “205/55R16 91V,” the “V” represents the speed rating. The difference between 103v and 107v tires is the speed rating. A 103v tire has a speed rating of 103 mph, while a 107v tire has a speed rating of 107 mph. The H Speed Rating is a tire classification indicating a top speed capability of 130 mph (209 km/h). H - Up to 210 km/h. This tyre speed index should be used as a guide only. 0 4. Z. Tire Speed Rating Chart 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. The sidewall consists of information mentioned in alphanumeric format like the one shown in this example - 235/55 R18 100V. To illustrate, W-rated tires on an exotic sports car have a max speed of 168 mph, while that of a V tire is 149 mph. The 119Q can handle a load of up to 2998 lbs, while the 114Q is slightly less robust, with a maximum load capacity of 2601 lbs. The lowest ratings are. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. 1) Most Maruti Suzuki 1. 270 km/h. Exotic Sports Cars. For S-speed-rated tires, it's 112 mph; for T, 118 mph. The speed rating must be stamped on the tyre. 300. The tyre speed rating is represented by a letter at the end of a string of numbers. The speed rating doesn’t imply the vehicle can drive that. . In summary, H and T markings on tires refer to the maximum speeds they can support – given payload capacity, recommended tire pressure, and ideal road conditions are met. • H - up to 130 mph. H-rated tires are approved for speeds up to 130 mph (210 km/h). It signifies that the tire can safely handle speeds up to 186 mph or 300 km/h. They are often found on sports cars and high-performance vehicles that demand excellent handling and. Some tires have speed ratings of W, 168 mph and Y, 186 mph. The speed rating is represented by a letter – A being the lowest and Y being. About Tyre Speed Ratings. The DH7 center tread is designed for straight-line stability for long highway driving. You’ll find that most regular road cars will have tyres with an H or V rating. g. 4. Some tires have speed ratings of W, 168 mph and Y, 186 mph. There are also charts that exclude the “P” rating. The “T” speed rating says the tire would give a frequency of 118mph. ** Per the TR&A 2007 yearbook, for tires having a maximum speed capability above 240 km/h (149 mph), a ZR may appear in the size designation. These days, manufacturers mark even relatively inexpensive tires T (up to 118 mph). The T Speed Rating falls in the middle of the tire speed rating spectrum. H-rated tires are designed for speeds up to 130 mph,. The first year of the purchase or first 2/32 inch of wear has a uniformity warranty. The most common speed ratings are: • Q - up to 99 mph. With several ratings available, ‘H’ and ‘V’ are among the most common ones you might encounter. 110H: The “H” speed rating permits speeds up to 210 km/h or 130 mph. This means if you have a V-rated tire, it's designed to perform well at speeds up to 149 mph. Y is 186 miles per hour. 1947–1967. The speed rating is denoted by a letter, such as "H" or "V," which corresponds to a specific speed range. Find out if it's the right choice for your ride. The de Havilland Canada DHC-2 Beaver is a single-engined high-wing propeller -driven short. In this article, we’ll dive deep into the nuances of tire speed ratings, particularly H vs. Sports Cars, Exotic Cars. V, demystify common misconceptions, and guide. G: 90 kph 56 mph. Most passenger car tires have a speed rating of H, which means they can be driven up to 130 mph. The tyre size is 205/55 R16 96W. For speeds over 160km/h (100 mph), load and inflation must be adjusted according to the table below. Speed ratings. The speed rating is usually included in the tire size and performance code, which can be found on the tire’s sidewall. Each letter denotes the maximum speed a tire can sustain under its recommended load capacity. So, what does tyre rating W mean? Essentially, it means that your tyres will be able to handle a specific maximum speed while carrying a load. e. jtsanders February 15, 2012, 6:15am 17. The CS5 Ultra Touring is warrantied up to 50,000 miles in W speed rating specification and 70,000 miles in V or H specification. Speed ratings indicate the load capacity of tires, and they also measure how fast a tire can safely drive for at least 10 minutes. Humans have. The number 93 is the load index, signifying the maximum load the tire can carry. For S-speed-rated tires, it's 112 mph; for T, 118 mph. Being aware of the speed rating of your tyres. W (ZR) 270km/h or 168mph. The ‘Q,’ on the other hand, stands for the speed rating, designating the tire’s maximum speed limit, which is 160 km/h in this case. ZR. • S - up to 112 mph. But if your vehicle is riding on older rubber, you may have to look at your owner’s manual, driver’s side doorjamb, gas door, or glove box for your factory speed ratings. For tires intended for vehicles with a top speed higher than 149mph. Look for the tyre's sidewall: The speed rating is usually printed on the tyre's sidewall, along with other important information such as the size, load index, and type of tyre. But there is a little more to that. The speed rating is what determines how fast a tire can go before it tears itself apart. Then, there is the speed rating. If a tire reads “225/65R17/102H” it has a speed rating of H. Also, the speed rating references the testing and does not. When the full speed rating chart was put into effect H already had a designated speed of 130 MPH. What is H or V rating in a tire? H and V ratings are designations for passenger tires. Y Speed Rating, up to 186mph. Quite simply, you shouldn’t drive your car faster than the speed rating on the tyres on your vehicle. A T is rated for 118-mph max and 109-mph sustained driving for 5 hours. Dry and wet traction are very goodYes, you can use H-rated tires instead of V but keep in mind that the H-rated tires are good for speeds of up to 130 mph (210km/h). S — Up to 112 mph. These speed ratings are valid only when the tire is undamaged, properly inflated, and not. all explained. Tires with a Y speed rating undergo rigorous testing to ensure their durability and stability at high speeds. As you can guess, H-rated tires are superior. Here the last part i. H 210km/h Sport Sedans & Coupe Tyres. P — Up to 93 mph. For speeds over 160km/h (100 mph), load and inflation must be adjusted according to the table below. Nowadays, it means 149 mph but no higher. The ‘h’ rating denotes a maximum speed of 130 mph (210 km/h), while ‘v’ represents a maximum speed of 149 mph (240 km/h). T is 118, H is 130, V is 149. The service description is two separate ratings. The speed rating of a tire is usually molded into the sidewall of a tire along with the tire size designation. A lower rated tyre may or may not exceed a higher speed rating but will be aimed at a speciic market. • W - up to 168 mph. Some tires have speed ratings of W, 168 mph and Y, 186 mph. The current standard for tire size and information looks like P215/60R15 89H, where the 89 is the tire load capacity and the H indicates the speed rating. 2. is available in 9 sizes. In general, that speed goes up as the rating advances alphabetically. What do 93t, 93s, 93q, 93h, 93r, 93v, 93w mean on a tire? In a nutshell, these codes represent the load index and speed rating of a tire. Y - Up to 300 km/h. The vehicle’s handbook will also tell you the minimum tyre speed and load ratings you’ll need. Now, many people drive their car at. Tire Speed Rating Z is the highest speed rating that a tire can have. W Speed Rating: Max speed limit of 270 mph. High-performance automobiles like. P — Up to 93 mph. What Does 114w Mean On a Tire. Get to know your tire speed rating. So, if you’re a speed demon, 109V has your name on it. Above 186. Note that metric sizing uses both millimeters and inches, and requires conversions. Step on the tire to press the tire onto the rim. With this in mind, in this comparison, the V-rated tire will have an edge. Both 119Q and 114Q have the ‘Q’ speed rating which means they can safely reach speeds up to 99 mph. Secondly, it offers a wide range of features that are comparable to high-end, paid. Speed Rating: H, V, W; Tires aren’t always a product that you get what you pay for. , H, V, W) on the tire sidewall. Firstly, it’s free, which is a huge advantage for those just starting out in music production. R — Up to 106 mph. It’s like a speed limit for your tire! Here are some common speed ratings: S: Up to 112 mph. These tires are suitable for various passenger cars and trucks, offering a balance of performance, stability, and comfort for everyday driving. Once the highest speed rating a tire could have, “V” used to represent a maximum of 149 mph (240 kph) or more. The main difference between H and V ratings is the tempo. Above 300 km/h or 186mph. Coho has twin 8-foot (2. 100V represents the load index and the. But which is better? The main difference between H and V ratings is the. V-rated tires can handle up to 149 mph, so they are ideal for sports cars. Once the highest speed rating a tire could have, “V” used to represent a maximum of 149 mph (240 kph) or more. Speed rating is identified as a. Once a tyre has been designed, engineered and built, the tyre is verified through a series of tests performed by the tyre manufacturers themselves. You can check the tyre speed rating on the sidewall of a car. So if the Z rating is still used, it must be in conjunction with the W as. CONTINUOUS SHOULDER DESIGN. In the tire speed rating system, the letter code corresponds to the maximum speed at which the tire can safely operate for an extended period. For S-speed-rated tires, it's 112 mph; for T, 118 mph. If you go over this threshold, you are risking various consequences such as accelerated tire wear. P 93 mph 150 km/h. The difference lies in the speed capabilities. Garageband vs Other Music Production Software.