h v w speed rating. 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). h v w speed rating

 
 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)h v w speed rating  In this example, the car’s speed rating is W, which indicates that it has

Using tires with a lower speed rating than recommended can compromise handling and safety. 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. Now, let’s decode ‘102H. Z-rated high-performance tyres are rated for speeds in excess of 149mph. This rating is reserved for high-performance vehicles and sports cars, designed to handle higher speeds and enhance performance. The “W” here translates to a speed rating of 270 km/h. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. Speed ratings are given letters, and each letter represents a speed between 75-186 mph. Currently, there are more than a dozen speed ratings for tires offered in the United States. If a tire reads “225/65R17/102H” it has a speed rating of H. W Speed Rating: Max speed limit of 270 mph. Same with VINs, no O/Q/0 or I/1. While all Z-speed rated tires are capable of speeds of 149 mph and above, prior to the W- and Y-speed ratings were identified in the service, how far above 149 mph was not identified. Back in 1960’s Europe, when the system was first introduced, testing boffins decided that the world needed only three classifications; S, H, and V. ” It represents a maximum speed of 210 km/h and is commonly found on sports sedans and coupes. A load index is an assigned numerical value that signifies a tire's maximum load carrying capacity. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. The tyre speed rating is represented by a letter at the end of a string of numbers. Some tires have speed ratings of W, 168 mph and Y, 186 mph. The speed rating is denoted by a letter, such as "H" or "V," which corresponds to a specific speed range. Here, the tire speed rating is V. An H tire’s maximum pace operating is about 130 mph under favorable circumstances. What does 101T mean on a tire. The speed rating code is semi-alphabetic and goes like this: B: 50 kph 31 mph. Y 186. An H tire’s maximum pace operating is about 130 mph under favorable circumstances. The most common speed ratings are: • Q - up to 99 mph. 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. Specifically, H-rated tires are approved for a maximum speed of 130 mph, while V-rated tires can handle speeds up to 149 mph. The speed symbol of H is given after the load index. However, most tires for consumer use are at least S-rated, indicating a maximum driving speed of 112 mph (180 km/h). This wouldn't be wise from either an insurance or safety point of view. The major difference between speed rating tires H and V is the tempo. Number 205: width of the tire in millimetres. S meant "speed", H "high speed", and V "very high speed". TK-BMW. The Speed Rating Is the Letter Listed After Tire Size. 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. The tire speed rating chart is your compass in the world of tires. Touring Tires TIRE NAME SPEED RATING TYPE LIMITED WARRANTY Premier® A/S H/V/W All-Season 60k Primacy™ Defender MXV4®* T/H/V All-Season 60k Primacy™ MXM4®* H/V All-Season 55k Primacy™ MXM4®* W All-Season 45k Primacy™ MXM4® ZP* H/V All-Season 30k Pilot® MXM4® H/V All-Season 50k Pilot® MXM4® W All. For a T speed rating, it's 118 mph, and for an H rated. H ratings). Less frequently seen ratings are Q 99 mph and R 106 mph- used in some light truck tires. Typically the speed rating chart goes in alphabetical order in accordance with speeds from lowest to highest. 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. tire, we sell these often. 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). In this example, the letter ‘W’ at the end of the code represents the speed rating. Here are simple steps to find the speed rating on a tyre. Prior to 1991, the most popular speed ratings were “S,” “H” and “V. Understanding V And H-Rated Tires. 4 most common speed ratings are H, V, T, and W, so let’s see how they differ. The vehicle’s handbook will also tell you the minimum tyre speed and load ratings you’ll need. High-performance vehicles such as sports cars will come fitted with tyres with higher speed ratings, such as W, Y or (Y). For S-speed-rated tires, it's 112 mph; for T, 118 mph. The typical speed ratings are S, T, H, Y, U, W, and V. A: Again, the difference is in the speed rating. Facebook. For S-speed-rated tires, it's 112 mph; for T, 118 mph. The Speed Rating (like T, S, Q, H, R, V, W) indicates the top speed your tire can safely handle. These letters are arranged in increasing order of capability, with S being the lowest and Z being the highest. Both of them should be perfectly fine for your average driver. . Note that metric sizing uses both millimeters and inches, and requires conversions. M = 81mph/130kmh. Y (ZR) 300 km/h. This rating system (see below) shows the top speed for which a tire is certified. However, the difference lies in their speed ratings. The DH7 center tread is designed for straight-line stability for long highway driving. 0 1. S, H, and V were the original three developed and is why H is out of alpha order. This means to say that such a tire is designed to carry a maximum load of 1,521lbs and run at a maximum speed of 130mph. The most important factor is the maximum speed the tire can deliver. U 200km/h Sedans & Coupe Tyres. The exception to the rule is “H” at 130 mph which comes after “U” at 124 mph. A Z speed rating still appears on some tires sizes (ex: 225/50ZR16 91W). Q: The max speed for this type of tire is about 99 MPH. For example, 225/50HR16 would be an H speeding rating tire, and 225/50VR16 would be the same size tire except for V-rated. If you will never exceed or even approach the speed rating of 130 mph, the difference in speed rating between the H and the V rated tire is likely not relevant to. Get to know your tire speed rating. But there is a little more to that. These alphabets are assigned to indicate the maximum speeds a tire can be driven on ideally. N 140km/h Spare Tyre. Specifically speaking, V-rated tires can travel up to 149 mph sustained. Each letter denotes the maximum speed a tire can sustain under its recommended load capacity. Dimples on the tread act to distribute heat evenly across the tire to prevent abnormal wear, which in turn, extends strength and the life of the tire. 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". Everyday savings and free shipping in. So, if 98H. We would like to show you a description here but the site won’t allow us. Tire with higher speed rated usually has better traction which will give you higher lateral acceleration and shorter braking distance. H. H-rated tires are optimized for all-weather performance and longer tread life. The speed rating is represented by a letter – A being the lowest and Y being. The. The V rating has a top speed of 149 mph, making it suitable for high-performance cars. R: These tires are usually found on heavy-duty trucks, and their maximum allowable speed. The Q-rated products can be seen less often. For a tire to be speed rated, it must meet certain minimum industry standards for reaching and sustaining that specified speed. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. Q — Up to 99 mph. For example, if you find 235/45R18 94V on a tire’s sidewall, the ‘V’ mark indicates its speed rating. Book an appointment online or call us at (800) 741-7261. W 168. V — Up to 149 mph. 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. Going back to our Audi, the H speed rating is equal to 130 miles per hour, meaning that under optimal conditions, the tire can perform at speeds up to 130 mph. If you are purchasing tires for a vehicle that is used mainly for standard everyday driving, then you likely don’t need to buy an H or V rated tire. U 200km/h Sedans & Coupe Tyres. This is more than adequate for most day-to-day driving conditions. Unless you drive above 130 mph, it's nothing to worry about (V vs. G: 90 kph 56 mph. 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. See the full list below. Speed is not the only. 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. S 180km/h Family Sedans & Van Tyres. C: 60 kph 37 mph. The tyre speed rating will always be shown after the wheel size information, in the example below the Speed Rating is 'W'. For this reason, the wheel rim size (R) is also multiplied by 25. The speed ratings by letter are outlined below: L = 75mph/120kmh. In contrast, a V-rated tire’s top velocity is slightly faster than an H-rated tire, around 149 mph. • W - up to 168 mph. Tire Speed Rating V Vs. The sidewall consists of information mentioned in alphanumeric format like the one shown in this example - 235/55 R18 100V. And typically, higher speed rated tires don't last quite as long either. ** 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. The Sumitomo HTR A/S P03. shrimps/prawns, krills, coleoids, etc. These are usually the standard winter tires for a four-wheel-drive vehicle. About Tyre Speed Ratings. A speed rating is an often-overlooked metric, but it is also a crucial one when it comes to high-performance tires. So depending on the chosen tire size, drivers are looking at a maximum speed of 149mph or 169 mph. If I'm not mistaken, a 'T' speed rating is around 110 to 115 mph anyway. It signifies that your tire can maintain its load at speeds up to 168 mph or 270 km/h. N — Up to 87 mph. Additionally, they also rate many tire lines at least H (up to 130 mph). 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. The following letter – W – is the tyre's speed rating. 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. H 210km/h Sport Sedans & Coupe Tyres. H. H-rated tires are typically found on sportier vehicles, whereas a T-rated tire is more likely to be on family sedans and minivans. Remember, driving within safe speed limits ensures optimal tire performance and longevity. H speed rating. You’ll find that most regular road cars will have tyres with an H or V rating. A service description identifies the tire's load index and speed rating. R 106 mph 170 km/h. J: 100 kph 62 mph. Oversteer occurs when the vehicle loses traction at the rear. 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. V and H speeds are the two common tire speed ratings for performance tires and sports cars. 186mph. Rating Maximum Speed Use. The speed rating numbering system run from A1 to A8 in sequence, whilst the letters run from B to Y. A long-lasting, premium all-season tire, which offers one of the longest mileage warranties in its class. Speed rating on the tire displays the top-speed of the vehicle at which a tire safely functions, beyond this, it is not safe to use the tire, and it may burst. V-rated tires are approved for speeds up to 149 mph (240 km/h). The speed rating letter comes after the load rating. M 81 mph 130 km/h. The Ultramax AS tire is an all-season touring tire engineered to deliver exceptional handling and all-season performance. 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). For example, 94H or 102V. That particular character corresponds to a maximum speed of 130. It’s important to look at both together because the speed rating depends on driving with the right load. 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. Z. Tyre speed ratings like H, T, V, VR, ZR, W etc. 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. Once the highest speed rating a tire could have, “V” used to represent a maximum of 149 mph (240 kph) or more. S 180km/h Family Sedans & Van Tyres. In this case, the tire can carry up to 2,204 pounds (998 kg). V or W Speed Rating: 6 years and 65,000 miles treadwear warranty. (Y) 189. On the sidewall of every tire, you'll find one of these speed rating codes: M — Up to 81 mph. Speed Rating. In comparison, V-rated ones extend the performance of tires up to 149 mph. Note that modern tires are now rated with a speed rating and load index. W (ZR) 270 km/h. 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. T 190km/h Family Sedans & Van Tyres. It is generally not recommended to mix V and W rated tyres on a vehicle. 2 mph steps, in 10 minute increments, until the required speed has been met. Exceeding any of these can cause the tire to wear faster or even tear. You are allowed to use tires with a higher speed rating than designated, but not the reverse. A relatively low treadwear rating of 420 explains why Hankook limits warranty coverage to 80,000. The CS5 Ultra Touring is geared towards premium, performance, luxury touring coupes, sedans, small crossovers, and SUVs. Find your tires. The tire comes with a W speed rating and fits wheels ranging from 17 inches to 24 inches in diameter. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. We recommend that you fit the correct speed rated tyre as recommended by the manufacturer of the vehicle. Some tires have speed ratings of W, 168 mph and Y, 186 mph. A lower rated tyre may or may not exceed a higher speed rating but will be aimed at a speciic market. For instance, a 2022 Chevrolet Trailblazer LS comes with 225/60R-17 99H tires. Never mix speed ratings. Tire speed ratings range from A (the lowest) to Y (the highest). Speed rating corresponds to the maximum speed that a tire can sustain when it is carrying the recommended load capacity. W-rated tires have a maximum safe speed limit of up to 168 mph (270 km/h). For example, a tire description 235/45R18 94V means: 235 – Section Width (mm) 60 – Aspect Ratio (tire height divided by width) R – Radial Construction. Some tires have speed ratings of W, 168 mph and Y, 186 mph. E. 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). It is higher than the S Speed Rating, which is common on standard family cars, but lower than the H, V, and W Speed Ratings found. Let’s break these ratings down in an easy-to-reference table:. For S-speed-rated tires, it's 112 mph; for T, 118 mph. By selecting either V or W, you. Q - Up to 160 km/h. 0 3. H Speed Rating: Max speed limit of 210 mph. The first year of the purchase or first 2/32 inch of wear has a uniformity warranty. So, if you’re a speed demon, 109V has your name on it. The service description is two separate ratings. ), or OE markings (designating that a version was specifically designed for a vehicle. PREMIUM STANDARD TOURING ALL-SEASON. The speed rating is typically indicated as the last character in the tyre’s size code. SPEED RATING V. W is 168 miles per hour. Then, there is the speed rating. If you go over this threshold, you are risking various consequences such as accelerated tire wear. ZR. Instead of a number, they use a letter which corresponds to a maximum speed on the table below. A polyester cord body increases ride comfort, and hardened bead fillers in the sidewall create added handling capabilities. ’. The tyre load index and speed rating make up the tyre service description which is a standardized number located next to the size on the sidewall of the tyre. 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. 6 inches wide), 25. The Y-speed rating is for a top speed of 186 miles per hour. Should you equip V tires on that exotic sports car, you can never enjoy the racing feeling the W tires bring. Note that speed ratings in the UK are listed in kmph, not mph. And if the vehicle with V tyres goes faster than 240 kilometres per hour, the tyres would blow out. A T is rated for 118-mph max and 109-mph sustained driving for 5 hours. The ‘H’ here is the speed rating, which indicates the max speed the tire can safely maintain. The main difference between H and V ratings is the tempo. The other 92h codes on a tire are H, V, and Q. 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. Q-160km/h; R-170km/h; S-180km/h; T-190 km/h; U-200 km/h; H-210 km/h; V-240 km/h; W-270 km/h; Y-300 km/h; ZR-Capability beyond 300 km/h; Winter Tires Speed Rating. 2019 Porsche Macan. At one time, the maximum speed a tire could have, aVa, was a maximum of 240 km/h (149 mph) or more. So, when you see a 102H marking, it’s your tire saying, “I’m a strong, speedy fellow, perfect for your daily commutes or long road trips. Using the image below of a P195/60R15 87S tire, the load. For example, 225/50HR16 would be an H speeding rating tire, and 225/50VR16 would be the same size tire except for V-rated. For example, a tire rated “L” is good for a lower maximum sustained speed than one rated “N. I changed to 17-inch aftermarket wheels, and per my research, and discussion with the installer, the T is well within the speed rating for the RAV4, especially the 4-banger, lol. Tire’s Service Description; The speed rating may occasionally be mentioned in the tire’s service description. High-performance vehicles such as sports cars will come fitted with tyres with higher speed ratings, such as W, Y or (Y). The difference lies in the speed rating. You’ll typically find the V speed rating in semi-performance-focused cars, such as the Audi S4 and other high-end spec sedans and coupes. The Michelin CrossClimate 2 is an all-season tire, performing admirably on both sun-baked and rain-slicked roads to deliver a smooth ride and remarkable durability. tire, we sell these often. "H" ended up in an odd spot because they didn;t want to reclass it as. There are so many cars out there that are capable of over 130mph (which would require a "V" speed rating) that aren't "performance" cars and whose owners would be much more conerned about tire life than ultimate grip. Then lay the tire on top of the rim. Nowadays, it means 149 mph but. A 50K mile tread warranty is also part of the package. It is also a radially constructed tire. The speed rating is always indicated on the tire itself, right after the size information. 300. In this case, 85 means the tire is rated for 1,135 pounds (see Table 2). Table 1: Speed Rating Designations. In the context of tires, ‘H’ and ‘V’ are speed ratings. ” Traditionally, Crivoi explains, a V speed rating would be for an HP tire, while a W or Y speed rating would be for a UHP tire. The speed rating H & V is frequently indicated by a letter that comes right after the tire size. The speed rating of a tire indicates the maximum safe speed at. But the chart is not completely in alphabetical order. W. Welcome to NTB Tire and Service Centers! Shop tires, oil & fluid exchanges, brake services, AC recharges, steering & suspension, batteries and wipers. But there is a little more to that. Speed ratings are given letters, and each letter represents a speed between 75-186 mph. H is the speed rating. Speed rating ≠ top speed. Y 186. Brands rate most of their tires at 99 mph or higher. SIZE RANGE: 15" – 18" UTQG: 760 A A SPEED RATING: T & H186. 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. Your tire speed rating will be the final letter in your tire size. For example, Z was the highest rated speed at 149-plus until W and Y were used to match the higher speeds. Some tires have speed ratings of W, 168 mph and Y, 186 mph. ” However, while the speed capabilities of S- and H-rated tires still indicate the. It indicates that the tyre can safely operate at a maximum speed of 270 km/h. V is the speed rating, and the chart above means the tire will go at a maximum speed of 149 mph or 240 km/h. This rating is commonly found on tires for sedans and standard passenger vehicles. See moreSep 25, 2020Tire speed ratings, represented by letters like H and V, indicate a tire’s maximum safe operating speed. The tyre size is 205/55 R16 96W. V-rated tires have a maximum safe speed limit of up to 149 mph (240 km/h). They are often found on sports cars and high-performance vehicles that demand excellent handling and stability at elevated speeds. Up to 160 KM/H (99 MPH) Up to 240 KM/H (149 MPH) Up to 300 KM/H (186 MPH) SIGN UP FOR THE LATEST KAL TIRE NEWS, UPDATES & PROMOTIONS. In general, that speed goes up as the rating advances alphabetically. What is H or V rating in a tire? H and V ratings are designations for passenger tires. A fishing vessel is a boat or ship used to catch fish and other valuable nektonic aquatic animals (e. A 107t tire can operate at speeds up to 190 km/h, whereas a 107h tire can safely reach speeds up to 210 km/h. In our example, “H” is equivalent to a maximum speed of 209 kph (130 mph). You can use the chart below to convert these ratings into the actual maximum speed that. You'll usually find the speed rating — represented by a letter — after the tire's size info, paired with the load rating. For example, in a tyre size code of P225/60R16 97V, the speed rating is V. Signaling their road-holding capabilities, they have a V speed rating, which indicates a maximum speed of 149 mph. What is “Tire load. Speed Rating H As mentioned above, the “H” speed rating does not appear after “G” but instead between “U” and “V”. Tires with a Y speed rating undergo rigorous testing to ensure their durability and stability at high speeds. 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). T 190km/h Family Sedans &. One thing is certain: swapping the two is not good for the vehicle or the driver. 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. It’s like a speed limit for your tire! Here are some common speed ratings: S: Up to 112 mph. Confusingly, W-rated tyres are rated at a higher speed in excess of 168mph. H - Up to 210 km/h. Here is the rating system used on different tires. Z is over 149 miles per hour. e. Speed ratings are based on a new tire’s performance in lab testing conditions, not your typical roadways. However, when it comes to speed, the 105Y tire, with a speed rating of 300 km/h, outpaces the 105W. Uniformity Warranty: First 2/32” wear, limited with 1-year. The LOAD INDEX is a numerical code associated with the maximum load a tyre can carry (except for loads at speeds above 130 mph (210 km/h) – see Table 2/2a) at the speed indicated by its Speed Symbol under service conditions specified by Avon Tyres. Speed rating of the tire is denoted by letters, like T, H, V, W, and so on. The speed rating must be stamped on the tyre. According to some manufacturers, tires can be safe up to 10 years after production, but in reality, five to six years is the usually accepted shelf life of a tire. The difference between 103v and 107v tires is the speed rating. They are often found on sports cars and high-performance vehicles that demand excellent handling and. W 168. Dec 18, 2015. 0 1. 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. Q 160km/h Winter Tyres. Load ratings indicate the maximum safe load a. The speed rating is expressed with letters, and there are several. 186 mph. The load index is a numerical value that indicates how much weight a tire can safely carry. It is also important to note that speed ratings only apply to tires that have not been under-inflated, overloaded, damaged, or altered. If your car or vehicle has several different tyre ratings, you shouldn. However, there are subtle contrasts that can affect your driving experience. M and N: The maximum speeds for these two ratings are 81 and 87 MPH respectively; this is typical of your average spare tire. 168 mph & 270 km/h. The “92T” on a tire stands for the tire’s load index and speed rating. In this example, the car’s speed rating is W, which indicates that it has. I am probably going to buy a set of Michelin Pilot Aplin 4s and I have 2 choices available: one with the "V" speed rating (max 240 km/h / 149 mp/h) or "W" speed rating variant (max 270 km/h / 168 mp/h). H is the only other speed rating that doesn't appear in. Always consult the manufacturer for the maximum speed of Unlimited Z tires. Meanwhile, the ‘W’ indicates the tire’s speed rating, allowing it to conquer speeds up to 270 km/h. 107t vs 107h: Again, both these tires can carry a load of 975 kg, but their speed ratings differ. It features an asymmetrical tread design for optimal control at high speeds on wet and dry. W Speed Rating, up to 168mph. Some tires have speed ratings of W, 168 mph and Y, 186 mph. V Speed Rating: Max speed limit of 240 mph. glizzy_Gustopher • 1 yr. You can safely put tyres with a higher speed rating on your vehicle. That’s because Z-speed tires were meant to represent speed ratings higher than 149 mph.