Tyre speed ratings are typically represented by a letter code that appears after the tyre size. 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. In the 60s or so, they used S, H, and V as the three ratings. That’s because Z-speed tires were meant to represent speed ratings higher than 149 mph. H, V, W and Z. What are the different speed ratings? L V rated tires are designed to handle speeds of up to 149 mph or 240 km/h. For example, in the size code “205/55R16 91V,” the “V” represents the speed rating. In most cases, such tyres have the R, S, or T rating. The W tire speed rating is higher than the V tire. P 150km/h Winter 4×4 Tyres. Common examples are H and V: An H-rated tire can safely run at a sustained maximum speed of 130 mph and a V-rated tire at 149 mph. This means if you have a V-rated tire, it's designed to perform well at speeds up to 149 mph. Speed ratings are based on scientific tests where the tyre is run at speeds in 6. Remember, driving within safe speed limits ensures optimal tire performance and longevity. 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. H-rated tires can handle a maximum speed of 130 mph, while V-rated ones are good for up to 149. 25 & 2. Check Pricing. So, if 98H. H-rated tires can carry up to 1,300 pounds per tire, while V-rated tires can carry. Next is the speed rating, which is indicated by a letter. D: 65 kph 40 mph. Those are strong tread warranties indeed, but the CS5 Grand Touring, with its slightly lesser performance orientation, boosts that treadwear protection up to 80,000 miles. These alphanumeric codes represent the Load Index and Speed Rating of the tire. The Speed Rating (like T, S, Q, H, R, V, W) indicates the top speed your tire can safely handle. W - Up to 270 km/h. V-rated. --Tobias. Let’s break these ratings down in an easy-to-reference table:. H Speed Rating: 6 years and 75,000 miles treadwear warranty. S 112 MPH. Your H-rated tires should go up to 130 mph, but your V-rated tires can be driven at up to 149 mph. And typically, higher speed rated tires don't last quite as long either. Some tires have speed ratings of W, 168 mph and Y, 186 mph. These speed ratings provide a more precise indicator of a high performance tire’s speed over 149MPH. ZRW: 270 kph 168 mph ZRY: 300 kph 186 mph ZR(Y): 300+ kph 186+ mph. The speed rating is another essential part of your tire’s performance. ”. Q: 104h vs 104t, what’s the difference? A: Both have the same load index of 104, meaning they can safely carry 1984 lbs. That would mean the tire’s speed rating is W, or capable of going 168 mph or 270 km/h. Note that modern tires are now rated with a speed rating and load index. Thus, the rule is that the H-speed rated tires and above have double belt under the thread not a single one. That letter represents the tire’s speed rating. Same with VINs, no O/Q/0 or I/1. Above 300 km/h or 186mph. 149mph+. The. The CS5 Ultra Touring is geared towards premium, performance, luxury touring coupes, sedans, small crossovers, and SUVs. all explained. S meant "speed", H "high speed", and V "very high speed". The speed symbol located on your tire indicates the maximum speed capability of the tire when properly loaded and inflated. ZR. Coho has twin 8-foot (2. U is 124 miles per hour. Load ratings indicate the maximum safe load a. If your vehicle has a ‘V’ tyre speed rating, it is capable of handling speeds of 240km/h, while a ‘U’ speed rating specifies maximum speed of 200km/h. Once the highest speed rating a tire could have, “V” used to represent a maximum of 149 mph (240 kph) or more. jtsanders February 15, 2012, 6:15am 17. The DH7 center tread is designed for straight-line stability for long highway driving. H - 130 mph; V - 149 mph; W - 168 mph; Y - 186 mph (Y) - more than 186 mph. 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:. The letter in a speed rating represents a maximum speed based on a standard chart (seen below). There are no “I”, “O”, and “X” ratings. The speed rating doesn’t imply the vehicle can drive that. Confusingly, W-rated tyres are rated at a higher speed in excess of 168mph. You could put both of these tires on your vehicle simultaneously if the load rating is appropriate for your vehicle. However, the difference lies in their speed ratings. The speed rating appears at the end of the size-related information. Load Index. Tire speed ratings should never be associated with the ability of the vehicle to handle the speed for which the tire is rated. The only difference is that the V speed rating can reach up to 240, and the Z is between 240 and 270 km/h. “98” denotes the Load Index, indicating that the tire can support up to 750 kg. In comparison, V-rated ones extend the performance of tires up to 149 mph. This letter corresponds to a specific speed range, and it’s crucial to match this rating with your vehicle’s capabilities and driving habits. You can easily find out the tyre speed rating by looking at the tyre markings on the existing tyres. 0 5. For instance, S is equivalent to a maximum speed of 112 mph. 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. 581 posts · Joined 2015. The speed rating is what determines how fast a tire can go before it tears itself apart. They are often found on sports cars and high-performance vehicles that demand excellent handling and stability at elevated speeds. Speed rating. The following letter – W – is the tyre's speed rating. The speed rating code is semi-alphabetic and goes like this: B: 50 kph 31 mph. G: 90 kph 56 mph. W (ZR) 270km/h or 168mph. For instance, a 2022 Chevrolet Trailblazer LS comes with 225/60R-17 99H tires. The Speed Rating Is the Letter Listed After Tire Size. 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. However, there are subtle contrasts that can affect your driving experience. Speed Ratings: The letter indicating the speed rating gives the maximum speed at which the tyre can carry its rated load. 103v vs 107vv tires. ) in the sea, lake or river. Remember, driving within safe speed limits ensures optimal tire performance and longevity. 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. H is the speed rating. U 200km/h Sedans & Coupe Tyres. Specifically speaking, V-rated tires can travel up to 149 mph sustained. Based on the tire rating system, you will have an informed choice. The reason for this is that car tyres with different speed ratings can have different handling characteristics, which can affect the overall performance and safety of the vehicle. The code consists of a series of letters and numbers. ZR. 168 mph & 270 km/h. Up to 50 mph (80km/h) FortNine is your source for Motorcycle, Dirt Bike, Snowmobile and ATV apparel, accessories, and parts. With a maximum speed of 118 mph190km/h, you usually find tyres with speed rating “T” on family sedans and minivans. Family cars, vans, and light-duty trucks are rated "P" (93 mph) to "T" (118 mph) by the majority of everyday drivers. An H tire’s maximum pace operating under favorable circumstances is approximately 130 mph. For instance, a 2022 Chevrolet Trailblazer LS comes with 225/60R-17 99H tires. For S-speed-rated tires, it's 112 mph; for T, 118 mph. The main difference between the two speed ratings is obviously the speed. Speed Rating V. As manufacturers continue to add speed to their vehicles, tire speed ratings evolve to match the speeds. We would like to show you a description here but the site won’t allow us. It has a top speed of 118 mph. . Models with H, V and W speed ratings: 55,000 miles warranty; Models with W speed rating: 45,000 miles warranty; Models with H speed rating: 30,000 and 60,000 miles warranty; So what do these warranty periods tell us? Models that are provided with lower speed (H) rating last at least 15,000 miles before than those which come with the. M 130km/h Spare Tyre. Here are simple steps to find the speed rating on a tyre. T 190km/h Family Sedans & Van Tyres. This rating represents a maximum speed of 130 mph, or 210 kph. The ‘H’ here is the speed rating, which indicates the max speed the tire can safely maintain. What speed rating is Zr? SPEED RATING SPEED SYMBOL SPEED (mph) ZR* W 168 Y 186 (Y) Above 186. That particular character corresponds to a maximum speed of 130. 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. The code ’95W’ holds the key to understanding the tire’s load index and speed rating. The letter that follows indicates the speed rating, that is, the maximum speed at which the tire can carry a load corresponding. Thats well below the speed limit of most states, unless youre planning on bringing your commuter on the Autobahn. When a tire is stamped “205/65R15/94V,” it has a speed rating of V. A tire speed rating- H defines a maximum speed of 130 mph at which the tire must still perform as designed. V 240km/h or 149mph. For example, H falls between U and V, with the common perception that H stood for "high performance" at one time. V Speed Rating. These speed ratings are valid only when the tire is undamaged, properly inflated, and not. ZR Above 240 km/h. When new cars were developed that could exceed this speed, the automotive industry added the W and Y ratings. The V speed rating is the highest speed rating a tire can receive, meaning it is designed to hold up to the highest speeds while still offering a comfortable, safe driving experience. N 140km/h Spare Tyre. 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). R 170km/h 4×4 & Bakkies Tyres. M+S ratings are overused these days. But there is a little more to that. 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. Here’s a quick reference to standard tire speed rating codes. • 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. The car manufacturer always fit a tyre with a speed rating that is rated for the maximum speed vehicle is capable of doing (not the speedometer max value). The tire speed rating chart is your compass in the world of tires. Firstly, it’s free, which is a huge advantage for those just starting out in music production. For example, 225/50HR16 would be an H speeding rating tire, and 225/50VR16 would be the same size tire except for V-rated. 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 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. H 210km/h Sport Sedans & Coupe Tyres. In our example, “H” is equivalent to a maximum speed of 209 kph (130 mph). The other 92h codes on a tire are H, V, and Q. For S-speed-rated tires, it's 112 mph; for T, 118 mph. So if the Z rating is still used, it must be in conjunction with the W as. Q 160km/h Winter Tyres. The “T” is the speed rating, signifying that this tire can safely operate up to a maximum speed of 190 km/h. It is also important to note that speed ratings only apply to tires that have not been under-inflated, overloaded, damaged, or altered. Once the highest speed rating a tire could have, “V” used to represent a maximum of 149 mph (240 kph) or more. Tire Speed Rating H Vs T. Meanwhile, it’s 168 mph for a W-speed-rating tire. 0 Load Capacity (% of max. Groove serration provides stability and the lateral groove design offers a peaceful and comfortable ride. Considerations Car manufacturers optimize the suspension and handling characteristics of a car for the type and size of tires originally installed. however it is in the area of the cap plies that allows a H rating and reduces tyre failure. • V - up to 149 mph. The difference lies in the speed capabilities. : Up to 87 mph (140 km/h) : Up to 93 mph (150 km/h) : Up to 99. The W rating replaced what was once Z, which was anything above 149 at the time, and is now limited to 168 mph. 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. Q — Up to 99 mph. However, there are also tires with higher speed ratings such as V (149 mph), W (168 mph), Y (186 mph), and ZR ( over 186 mph). W Speed Rating. H - Up to 210 km/h. Summer tyres are designed for higher speeds, and, as a rule, have the H, V, W, or Y rating. Z. W 168. T 190km/h Family Sedans &. These tires are suitable for various passenger cars and trucks, offering a balance of performance, stability, and comfort for everyday driving. You will see the actual speed rating at the end of the 92Y indicator. In this example, the letter ‘W’ at the end of the code represents the speed rating. The new Supermax UHP-1 all-season ultra-high performance tire from Horizon Tire Inc. Exceeding any of these can cause the tire to wear faster or even tear. V rated tires are designed to handle speeds of up to 149 mph or 240 km/h. In the case of a 94-rated tyre, you can see in the table below that it would have a rating of 670kg. In general, that speed goes up as the rating advances alphabetically. These days, manufacturers mark even relatively inexpensive tires T (up to 118 mph). On the other hand, an S speed-rated tire is rated for 112mph or 180kph which means that this tire isn’t. V-rated tires step up maximum speed capabilities to a maximum of 149mph. Seven more sizes are in development. You can’t drive with tyres that are lower than the recommended speed rating. shrimps/prawns, krills, coleoids, etc. When the full speed rating chart was put into effect H already had a designated speed of 130 MPH. The speed rating is expressed with letters, and there are several. H-rated tires only allow you to rev up within a maximum range of 130 mph. This is a common O. Continental offers a six-year warranty for PureContact LX25. TK-BMW. The Y speed rated tire will feel stiffer (given the same sidewall height) than the W. Plus higher pressure is recommended if attempting such things (and if so, hopefully on an official track course). V Speed Rating: Max speed limit of 240 mph. What does 94T mean on a tire? The “94T” on a tire indicates its load-carrying capacity and speed rating. The “W” here translates to a speed rating of 270 km/h. An ‘H-rated tire is rated at 130 mph, while a ‘V’ rated tire has a top speed of 149 mph. Similarly, if the tyre speed rating is V, it means that the fastest the tyre can go is 240 km per hour. To receive its rating it must demonstrate that it can sustain a particular speed when tested with simulated loads. But tire makers test their own tires and assign their own speed ratings. The difference lies in. The sidewall consists of information mentioned in alphanumeric format like the one shown in this example - 235/55 R18 100V. 0 4. 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. 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". N — Up to 87 mph. 2 mph steps, in 10 minute increments, until the required speed has been met. While both share the same load index ’87’, ‘h’ denotes a speed rating up to 210 Km/h, whereas ‘v’ boasts a speed rating up to 240 Km/h. At the same time, H-rated tires can only go a speed of 130 mph. Z is over 149 miles per hour. The below table shows the max speed for each speed rating: 119Q vs 114Q. These two speed ratings will feel different across the performance spectrum. de Havilland Canada DHC-3 Otter. While a Z-speed rating still often appears in the tire size designation of these tires, such as 225/50ZR16 91W, the Z in the size signifies a maximum speed capability in excess of 149 mph, 240 km/h; the W in the service description indicates the tire's 168 mph. There are no “I”, “O”, and “X” ratings. 92h on a tire means the speed that the tyre is legally approved for. V Is for Very High Speed. That would mean the tire’s speed rating is W, or capable of going 168 mph or 270. H-rated tires can handle a maximum speed of 130 mph, while V-rated ones are good for up to 149. H is the only other speed rating that doesn't appear in. V 240km/h Sport Sedans, Coupes & Sports Car Tyres. The T and S ratings indicate speeds up to 118 mph (190 km/h) and 112 mph (180 km/h) respectively, making them suitable for everyday passenger vehicles. Today’s speed rating system uses letters A through Z. V means that vehicles can safely use the tire with a top speed higher than 149mph. While there are numerous options for music production software out there, Garageband holds its own for several reasons. 100V represents the load index and. S: Up to 112 mph (180 km/h) – This rating is usually for family cars and minivans. 105W vs 105Y. Speed ratings are given letters, and each letter represents a speed between 75-186 mph. For a tire to be speed rated, it must meet certain minimum industry standards for reaching and sustaining that specified speed. Looking at the charts above, 95H refers to a tire with a load capacity of 1,521 pounds and a maximum speed rating of 130mph. Understanding V And H-Rated Tires. V 240km/h Sport Sedans, Coupes & Sports Car Tyres. Tire sizes listed with 2. It is not a legal requirement to match the tyre placard's speed rating as long as it is not less than 140km/h for a 4WD or 180 km/h for passenger vehicles. In contrast, a V-rated tire’s top speed is slightly faster than an H-rated tire, around 149 mph. W and Y limited speed symbols have been added as higher speed categories. Because manufacturers add speed to their vehicles, tire speed ratings continue to evolve to match the speeds. If you are wanting to search for the correct. Speed Rating: H, V, W; Tires aren’t always a product that you get what you pay for. 2 mph steps, in 10 minute increments, until the required speed has been met. V-rated tires can handle up to 149 mph, so they are ideal for sports cars. The Y-speed rating is for a top speed of 186 miles per hour. 87v vs 87w – Which is faster?The Limited V category of 250 km/h (149 mph) was then created, and the Z speed rating was added as the top speed rating that a tire could achieve. To further add to (and possibly confuse) the code of reading tires, there are also speed ratings denoted by letters. There are a bunch of different speed ratings, but we’ll focus on the ones you’ll most likely come across when shopping for tires for your car or truck: H-rated and V-rated tires. Tyre speed ratings are typically represented by a letter code that appears after the tyre size. This guide will go into the specific characteristics of H and V. 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. V-rated tires have a top speed of 149 mph (240 km/h), W-rated tires can handle up to 168 mph (270 km/h), Y-rated tires have a maximum speed of 186 mph (300 km/h), and Z-rated tires are for vehicles with top speeds over 186 mph. Typically, the Z, W and Y ratings appear on summer tires or competition. 50 as the first number (section width in inches) are rated for no more than. Michelin’s are great tires, and also cost a lot. E: 70 kph 43 mph. Despite being substantially further in alphabetical order, T-rated tires have a lower speed rating than H-rated tires. However, you want to focus on the single letter at the end of the code. Some low-speed tires are rated as A1 – A8 –, but these have significantly low-speed ratings. 300 km/h. The tyre speed rating will always be shown after the wheel size information, in the example below the Speed Rating is 'W'. This tire comes with a 25,000-mile warranty. For instance, a tire code can be 207/55R/06/91V. N 87 mph 140km/h. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. The H Speed Rating is a tire classification indicating a top speed capability of 130 mph (209 km/h). Y (ZR) 300 km/h. That’s why we asked Engineering Explained’s Jason Fenske to teach you how to identify your tire spee. In the instance of the tyre size shown above, the speed rating would be " V " - this allows a maximum speed of 149mph. It is also a radially constructed tire. #6 · May 7, 2016. A lower rated tyre may or may not exceed a higher speed rating but will be aimed at a speciic market. V 240 km/h. 1) Most Maruti Suzuki 1. Never mix speed ratings. SPEED RATING V. Aside from being illegal, it can cause poor handling and unpredictable steering of your vehicle. 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. Tires with a Y speed rating undergo rigorous testing to ensure their durability and stability at high speeds. H rated tires are legal for driving at speeds up to 130 MPH, while V and Q rated tires are only legal for driving at speeds up to 99 MPH. Table 1: Speed Rating Designations. Speed Rating H As mentioned above, the. SPEED RATING V. Speed ratings are given letters, and each letter represents a speed between 75-186 mph. For a T speed rating, it's 118 mph, and for an H rated. As an illustration, you may see “235/45R17 94V,” where “V” denotes the speed rating. A relatively new addition to the table, aWa speed-rated tires can achieve a sustained top speed of 168 mph (270 km/h). The lowest ratings are. It signifies that your tire can maintain its load at speeds up to 168 mph or 270 km/h. H (Speed Rating): A speed rating of “H” means that this tire is designed to withstand speeds up to 130 miles per hour. Using the image below of a P195/60R15 87S tire, the load. For S-speed-rated tires, it's 112 mph; for T, 118 mph. Tires with a W speed rating (270km/h) are high-quality ones that provide excellent performance for sports. For S-speed-rated tires, it's 112 mph; for T, 118 mph. W. , in excess of 149 mph. W Vs Y-Rated Tries – Final VerdictThe Wild ‘W’ – Speed Rating. Y Speed Rating. Oversteer occurs when the vehicle loses traction at the rear. SPEED RATING W. PREMIUM STANDARD TOURING ALL-SEASON. Check the chart below:The higher speed tire has to dissipate more heat, thus the sidewalls are made thinner. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. When it was first established, the Z speed rating was the highest rating and was assumed to be the highest speed rating that. You can find out more about this in the table below. * W- and Y-speed ratings are subcategories of the Z-speed rating. Facebook. A tire with a “V” speed rating can handle 240 km/hr, or 149 mph. 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). H speed rating. 2019 Porsche Macan. Therefore, there is. 2. S 180km/h Family Sedans & Van Tyres. The V rating has a top speed of 149 mph, making it suitable for high-performance cars. The term ‘103Q’ on a tire is the tire’s calling card. If the tire set shows varying wear, you can get a replacement or a refund. Difference Between H, V, and W Rated Tires. Each letter coincides to the maximum speed a tire can sustain under its recommended load capacity. Sports Cars, Exotic Cars. You can find super-grippy, short-life, extreme performance tires that only have an H-rating, and you can also find high. A 50K mile tread warranty is also part of the package. Since then, tires have been made that are capable of reaching even higher speeds, leading to the creation of the W and Y speed ratings. The speed ratings by letter are outlined below: L = 75mph/120kmh. It is good to know that this Cooper tire comes in various sizes from 15 to 19 inches, with speed ratings of V, W, and H. Speed rating ≠ top speed. Here is the rating system used on different tires. Speed Rating W. For S-speed-rated tires, it's 112 mph; for T, 118 mph. These alphabets are assigned to indicate the maximum speeds a tire can be driven on ideally. While the 97W can handle speeds up to 168 mph, the 97Y takes it up a notch and can handle speeds up to 186 mph. About Tyre Speed Ratings. 130 mph & 210 km/h. 168 mph. Re: W and Y rated tyres. The Speed Rating Is the Letter Listed After Tire Size. While both have the same load capacity (560 kg or 1235 lbs), 88T tires have a speed rating of 118 mph (190 km/h), and 88H tires can handle speeds up to 130 mph (210 km/h). The tire comes with a W speed rating and fits wheels ranging from 17 inches to 24 inches in diameter. Specifically, H-rated tires have a maximum speed of 130 mph. Secondly, it offers a wide range of features that are comparable to high-end, paid. 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. Festive Offer Use Code: FESTIVE15 and get 15% Off Upto ₹ 750/-Contact Us. If we take the above image as an example, the tire size’s code is “225/45R19 92W”. T — Up to 118 mph. W Speed Rating: Max speed limit of 270 mph. Simply put, if your vehicle and driving needs have a need for speed, 87v might be your tire of choice! 2. If I'm not mistaken, a 'T' speed rating is around 110 to 115 mph anyway. These days, until you get into the Z/W/Y speed ratings, the cost of the tires between a S/T/H speed ratings isn’t significant. The sidewall of your tyres can come off. Meanwhile, the letter V that follows the load index shows the speed rating of the vehicle. Speed ratings are given letters, and each letter represents a speed between 75-186 mph. 08 axle figures apply to normally-aspirated SY and SZ cars before Chassis 44,000. What I would do is buy 4 good H. Based on the tire rating system, you will have an informed choice. An H tire’s maximum pace operating is about 130 mph under favorable circumstances. Nowadays, it means 149 mph but no higher. E. This G-Max tire is 245mm wide (about 9. 0L naturally aspirated engine with a 147HP. See moreSep 25, 2020Tire speed ratings, represented by letters like H and V, indicate a tire’s maximum safe operating speed.