H v w speed rating. Because manufacturers add speed to their vehicles, tire speed ratings continue to evolve to match the speeds. H v w speed rating

 
 Because manufacturers add speed to their vehicles, tire speed ratings continue to evolve to match the speedsH v w speed rating V or W Speed Rating: 6 years and 65,000 miles treadwear warranty

When the full speed rating chart was put into effect H already had a designated speed of 130 MPH. ZR stands for Z-Rated. The speed rating code is semi-alphabetic and goes like this: B: 50 kph 31 mph. The ’95’ signifies a load index of 95, meaning the tire can bear up to 690 kg of weight. Today’s speed rating system uses letters A through Z. The “T” is the Speed Rating, signifying the tire can safely reach speeds up to 118 mph (190 km/h). So if the Z rating is still used, it must be in conjunction with the W as. So which tyre speed rating do I need? Most standard consumer vehicles fall under the speed rating of S or T (for 112 or 118 mph limits). For example, if your tyre reads 255/55 R 16 91V, then your tyre speed rating is ‘V’. If the mph speeds assigned to each speed rating. The speed rating is typically indicated as the last character in the tyre’s size code. The V category changed to 149 mph and the Z speed rating was introduced to cover speeds over 149 mph. N 87 MPH. Tire Speed Rating Z is the highest speed rating that a tire can have. 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. However, if you drive a high-performance vehicle or a sports car that often have wide diameter tyres you may need to opt for a. This is not to be confused with the load index. Additionally, they also rate many tire lines at least H (up to 130 mph). The “H” speed rating says that the tire would give a frequency of 130mph. The T Speed Rating falls in the middle of the tire speed rating spectrum. N 140km/h Spare Tyre. 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:. But let’s keep those wild speed fantasies in check! These numbers are for your tire’s safety and longevity. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. V 240km/h Sport Sedans, Coupes & Sports Car Tyres. H Speed Rating: Max speed limit of 210 mph. This tyre speed index should be used as a guide only. It’s represented by a letter. 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. And typically, higher speed rated tires don't last quite as long either. Y 186. ” However, while the speed capabilities of S- and H-rated tires still indicate the. ** 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. For tires having a maximum speed capacity above. M 130km/h Spare Tyre. For example, H falls between U and V, with the common perception that H stood for "high performance" at one time. There is no reason to buy tyres with a speed rating that exceeds your car’s top speed. e. From "L," which represents the lowest-rated tire (75 mph), to " (Y)," which is reserved for extreme sports automobiles capable of speeds over 186 miles per hour, each speed rating is given an alphabetical letter. ) 100 100 100 100 100 100 V-Speed Rated Sizes: Maximum Speed (mph) 100 106 112 118 124 130 136 143. At first, both V and W speed ratings promise great performance on the road. The Speed Rating (like T, S, Q, H, R, V, W) indicates the top speed your tire can safely handle. Ideally, the lower speed-rated tyres should be placed on the front axle, regardless of whether it’s front or rear-wheel drive, in order to prevent oversteer. V means that vehicles can safely use the tire with a top speed higher than 149mph. It does not indicate the total performance capability of a tire. Tire speed ratings are paired with the load index. H 210km/h or 130mph. H is 140 miles per hour. e. As you can guess, H-rated tires are superior. (Y) 189. Once the highest speed rating a tire could have, “V” used to represent a maximum of 149 mph (240 kph) or more. Also, the ZR rating isn’t truly unique, as it includes both W- and Y-rated tires. The most common speed ratings are: • Q - up to 99 mph. This is because UK tyre speed ratings are based on European Union-wide limits, and mainland Europe measures. Difference Between H, V, and W Rated Tires. Can V-Rated Tires Go Faster than H-Rated Tires? V 149. Above 300 km/h or 186mph. 00, 2. Another thing you must always remember is the fact that it’s never safe to exceed the limit identified by the speed. Speed Ratings: The letter indicating the speed rating gives the maximum speed at which the tyre can carry its rated load. , in excess of 149 mph. ZR. S. If speed thrills you, consider the 105W. ZR Above 240 km/h. . Q 99 MPH Winter tires (w/or w/out studs) R 106 MPH H. P 150km/h Winter 4×4 Tyres. Understanding Tires Recommendations Conclusion Tire Speed Rating: What Are They? As it implies, the tire speed rating is the maximum speed your tires can. 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. 300. R 106 mph 170 km/h. You are allowed to use tires with a higher speed rating than designated, but not the reverse. Each type of tire is suitable for specific vehicle types and uses. Letters ranging from A to Z represent the speed rating. ” But the tire speed rating system isn’t without its. The most common ratings are S and T (sedans, minivans, light trucks); H (some passenger cars,. In comparison, V-rated ones extend the performance of tires up to 149 mph. The “W” speed rating denotes that the tire can handle speeds up to 168 mph (270 km/h). ”. Speed is not the only. Absolutely, NO. 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. * W- and Y-speed ratings are subcategories of the Z-speed rating. The difference between 103v and 107v tires is the speed rating. V Speed Rating. For example, let’s consider the following code: 225/50R17 94W. Tyre speed ratings are the maximum speeds that the tyre can safely handle. High-performance automobiles like. F: 80 kph 50 mph. 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. Similarly, if the tyre speed rating is V, it means that the fastest the tyre can go is 240 km per hour. V or Z speed rating, typically, is usable for pure sports cars. . D. High-performance vehicles such as sports cars will come fitted with tyres with higher speed ratings, such as W, Y or (Y). Both these tire types can safely carry up to 925 kg. They’ll cost more for no benefit. The load index also corresponds with a chart, which you’ll find in your book. 168 mph & 270 km/h. For speeds over 160km/h (100 mph), load and inflation must be adjusted according to the table below. 215/65R16 98 H. Wheels with an H-rating can withstand speeds of up to 130 mph, making them suitable for a sports sedan coupe. It's important for both legal and safety reasons to ensure the tyres fitted to your vehicle meet. The speed symbol of H is given after the load index. 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. Even though a tire can perform at this speed, we do not advocate exceeding legal speed limits. The. The official tire speed rating system in the United States begins at A1 (a maximum MPH of 3) and ends at. M+S ratings are overused these days. The speed rating is another essential part of your tire’s performance. On the sidewall of every tire, you'll find one of these speed rating codes: M — Up to 81 mph. The Load Index (105 in this case) indicates the maximum load that the tire can safely carry, while the letter following it (like T, S, Q, H, R, V, W) is the Speed Rating, which signifies the maximum speed at which the tire can safely travel. R 170km/h 4×4 & Bakkies Tyres. Festive Offer Use Code: FESTIVE15 and get 15% Off Upto ₹ 750/-Contact Us. A T is rated for 118-mph max and 109-mph sustained driving for 5 hours. For S-speed-rated tires, it's 112 mph; for T, 118 mph. 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. For S-speed-rated tires, it's 112 mph; for T, 118 mph. 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. For example, H is between U and V, with the common perception that H stood for “high performance”. Get to know your tire speed rating. This rating is reserved for high-performance vehicles and sports cars, designed to handle higher speeds and enhance performance. Tire Speed Rating H Vs T. Be aware of insurance companies as they do get fussy when it comes to the speed rating issue, even though manufacturers recommend a higher rated tyres something like a W. You can find out more about this in the table below. 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. 4 to obtain the wheel rim size in millimetres. 300. ” It represents a maximum speed of 210 km/h and is commonly found on sports sedans and coupes. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. Each letter corresponds to a specific speed rating. The tire speed rating, often a single letter found at the end of the tire size info, tells you the maximum speed a tire can handle when properly inflated and not carrying more than its maximum load. The “101T” tire code indicates a load index of 101, which means that each tire can support up to 825 kilograms. The speed ratings by letter are outlined below: L = 75mph/120kmh. Meanwhile, it’s 168 mph for a W-speed-rating tire. TK-BMW. P — Up to 93 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. Plus higher pressure is recommended if attempting such things (and if so, hopefully on an official track course). 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. The number 93 is the load index, signifying the maximum load the tire can carry. H ratings). If a tire reads “225/65R17/102H” it has a speed rating of H. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. 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. V-rated. In the context of tires, ‘H’ and ‘V’ are speed ratings. 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. The tyre speed rating is normally the final letter, found after the wheel diameter / rim size, for example 205/55R16 91V – with V being your tyre speed rating. Once the highest speed rating a tire could have, “V” used to represent a maximum of 149 mph (240 kph) or more. Then lay the tire on top of the rim. SOLID CENTER TREAD. You can safely put tyres with a higher speed rating on your vehicle. M: Maximum Speed – A tire with this rating can run up to 116 miles per hour (or 188 km/h). Speed ratings indicate the load capacity of tires, and they also measure how fast a tire can safely drive for at least 10 minutes. Speed Rating Chart Designation: L 120km/h 4×4 & Bakkie Tyres. 0 4. These tires were created to perform at high speeds. The main difference between 88T and 88H lies in the speed rating. In this example, the letter ‘W’ at the end of the code represents the speed rating. In general, that speed goes up as the rating advances alphabetically. Find out if it's the right choice for your ride. The lowest ratings are. This tire is ideal for most sports sedans and commuter vehicles. Winter tire speed rating is a crucial aspect to consider when choosing your vehicle's tires. The “T” indicates a speed rating, which suggests a maximum speed of 190 km/h. “98” denotes the Load Index, indicating that the tire can support up to 750 kg. P — Up to 93 mph. Speed rating is identified as a. The “T” speed rating says the tire would give a frequency of 118mph. Based on the tire rating system, you will have an informed choice. N — Up to 87 mph. The tyre size is 205/55 R16 96W. For instance, when you see 94T, this means that the load rating is 94 and the T indicated is the speed rating. W and Y-speed tires were innovated later as cars got faster with the help of technology. Tire speed ratings indicate the maximum speed that a tire can handle safely and effectively. It looks something like this: P225/60R16 97H. The speed rating is another essential part of your tire’s performance. These alphabets are assigned to indicate the maximum speeds a tire can be driven on ideally. The Nexen N’Fera SU1 has a speed rating of V, W, and Y and has a UTQG rating of 300 AA A. W. In imperial terms, the difference between each letter is approximately 6mph. ”. However, the letters’ speed ratings range from 5 km/h (3mph) to 300 km/h (186 mph). The Q-rated products can be seen less often. The de Havilland Canada DHC-2 Beaver is a single-engined high-wing propeller -driven short. Tire speed ratings should never be associated with the ability of the vehicle to handle the speed for which the tire is rated. H, V, W and Z. The major difference between speed rating tires H and V is the tempo. Book an appointment online or call us at (800) 741-7261. Get responsive handling and all-season performance from the W-speed rated Firehawk GT Pursuit and the V-speed rated Firehawk PV41. The N’Priz AH8 is designed for family sedans that require all-year traction in dry, wet and light snow conditions. It features an asymmetrical tread design for optimal control at high speeds on wet and dry. Yokohama defines high-performance tires with a speed symbol of 'H, V, W, Y, (Y)' or 'Z'. Get to know your tire speed rating. If your car or vehicle has several different tyre ratings, you shouldn. SPEED RATING V. 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. Z speed-rated tires originally reflected the highest tire speed rating - i. Speed rating: H (130 mph) or V (149 mph) Treadwear warranty: 60,000 to 90,000 miles Typical wheel size: 16 to 20 inches. jtsanders February 15, 2012, 6:15am 17. The main difference between H and V ratings is the tempo. For example, a tire with a size of P245/50ZR16 91W has a speed rating of 149+ mph and a load index of 1601 lbs. The speed rating system was developed to control the safe speeds at which tires must still perform as per the. 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. Exotic Sports Cars. T-Rated Tires: This tire is often recommended for family sedans and vans. As a result, the second tires are the ones you’d fit on a faster vehicle, capable of. Some tires have speed ratings of W, 168 mph and Y, 186 mph. If it can handle over 186 mph (300 km/h), it must have a “ZR” in the description. V Speed Rating, up to 149mph. ZR. Some tires have speed ratings of W, 168 mph and Y, 186 mph. Speed ratings are based on laboratory tests in which the tyre is run at 6. V or W Speed Rating: 6 years and 65,000 miles treadwear warranty. Now, many people drive their car at. Note that speed ratings in the UK are listed in kmph, not mph. T: Up to 118 mph. But tire makers test their own tires and assign their own speed ratings. Less frequently seen ratings are Q 99 mph and R 106 mph- used in some light truck tires. 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. The difference lies in. There are also charts that exclude the “P” rating. W Vs Y-Rated Tries – Final VerdictThe Wild ‘W’ – Speed Rating. W. The “99” in the code represents the load index, while the second letter represents the speed rating. “92” is the load index which indicates that the tire can carry a maximum load of 630 kg when properly inflated. The service description is two separate ratings. M = 81mph/130kmh. 100V represents the load index and. H-rated tires can handle a maximum speed of 130 mph, while V-rated ones are good for up to 149. Up to 186 mph (299 km/h) Scooter. If I'm not mistaken, a 'T' speed rating is around 110 to 115 mph anyway. Summer tyres are designed for higher speeds, and, as a rule, have the H, V, W, or Y rating. H: Maximum Speed – A tire that has this rating is capable of running at up to 130 miles per hour (or 225 km/h). The “94” denotes the Load Index, indicating the tire can carry a maximum load of 670 kg (1,477 pounds). H-rated tires are designed for speeds up to 130 mph,. For a tire to be speed rated, it must meet certain minimum industry standards for reaching and sustaining that specified speed. Your tire speed rating will be the final letter in your tire size. The most important factor is the maximum speed the tire can deliver. Exceeding your tire’s speed rating can cause it to fail. Speed ratings for other tires include Q, 99 mph; H, 130 mph; and V , 149 mph. The only difference is that the V speed rating can reach up to 240, and the Z is between 240 and 270 km/h. However, there are subtle contrasts that can affect your driving experience. 0 2. Each letter corresponds to a specific speed. Once the highest speed rating a tire could have, “V” used to represent a maximum of 149 mph (240 kph) or more. To receive its rating it must demonstrate that it can sustain a particular speed when tested with simulated loads. Therefore, tyres with this speed rating should not be driven over 149mph. A relatively low treadwear rating of 420 explains why Hankook limits warranty coverage to 80,000. SHOP. Rating Maximum Speed Use. In the instance of the tyre size shown above, the speed rating would be " V " - this allows a maximum speed of 149mph. Speed Rating W. W is 168 miles per hour. Z Speed Rating: Max speed limit beyond 240 mph. M 81 MPH Temporary Spare tires. V-rated tires have a maximum safe speed limit of up to 149 mph (240 km/h). Beyond that, the tire's performance, particularly its heat dissipation, could be compromised. 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. This tire comes with a 25,000-mile warranty. Tires with a “W” speed rating, a relatively new addition to the speed rating chart, can sustain speeds of up to 168 mph (270 kph). S meant "speed", H "high speed", and V "very high speed". 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". I understand that the speed rating is a 10min test (sustained speed at fixed temp) although most tyre manufactures will over design. Some tires have speed ratings of W, 168 mph and Y, 186 mph. Some tires have speed ratings of W, 168 mph and Y, 186 mph. ZR tires include the tire speed rating V, W, and Y. Some tires have speed ratings of W, 168 mph and Y, 186 mph. It’s usually represented by a letter found on the tire’s sidewall. V 240km/h or 149mph. Light Truck tires. – 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. The. 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. Each tire is specifically certified to perform to certain speeds. For instance, a 2022 Chevrolet Trailblazer LS comes with 225/60R-17 99H tires. Though it’s rare to reach the maximum speed rating of any vehicle tire in America, tire speed rating also indicates a tire’s. or 679 kgs. A: In addition to H and V, there are various other speed rating categories such as T, S, W, and Y. By selecting either V or W, you. For speeds over 160km/h (100 mph), load and inflation must be adjusted according to the table below. Advantages and Limitations of T Speed Rated Tires. SIZE RANGE: 14" – 17" UTQG: 460 A A SPEED RATING: S, T, H & V Find My Tires. 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. That particular character corresponds to a maximum speed of 130. Y is 186 miles per hour. H. But there is a little more to that. Z. These alphanumeric codes might look cryptic at first, but they convey valuable information. Here are some of the irregularities to know about when reading speed ratings: The “H” rating is between the “U” and the “V”, not after the “G”. If you fit cheaper, lower-speed-rated tyres, it. Like load ratings, speed ratings are regulated by law. Nowadays, it means 149 mph but no higher. For example, in the size code “205/55R16 91V,” the “V” represents the speed rating. In imperial terms, the difference between each letter is approximately 6mph. Don’t think your tire’s speed rating is your vehicle’s actual speed capacity. • H - up to 130 mph. T-Rated Tire: T-rated ones are frequently recommended for family sedans and vans. Once a tyre has been designed, engineered and built, the tyre is verified through a series of tests performed by the tyre manufacturers themselves. Speed ratings list the maximum pace the tire is designed to handle, and should not surpass that. 168 mph. It is not a one-and-only point that differentiates between H and V tires. With a maximum speed of 118 mph190km/h, you usually find tyres with speed rating “T” on family sedans and minivans. For S-speed-rated tires, it's 112 mph; for T, 118 mph. If you’re looking for a tire that can handle high speeds and intense driving, then you should choose a tire with a high-speed rating. These ratings are essential as they ensure optimal performance and safety on the roads. Each letter coincides to the maximum speed a tire can sustain under its recommended load capacity. all explained. Y-rated tyres are rated in excess of 186mph. Firstly, it’s free, which is a huge advantage for those just starting out in music production. , in excess of 149 mph. For instance, a 2022 Chevrolet Trailblazer LS comes with 225/60R-17 99H tires. ), load index (ex : 91, 94, XL, etc. 97t vs 97h. The W tire speed rating is higher than the V tire. You'll find these ratings imprinted on the sidewall of your tires, usually following the load index. H – 130 mph; V – 149 mph; W – 168 mph; Y – 186 mph; Old style: J Type – 62 mph; N Type – 87 mph; P. Contents [ show ]To determine the speed rating of your car’s tyres, check the sidewall of the tyres. You can always go up in performance rating, but you can never downgrade. For example, if you find 235/45R18 94V on a tire’s sidewall, the ‘V’ mark indicates its speed rating. Most passenger car tires have a speed rating of H, which means they can be driven up to 130 mph. This tire certainly packs a punch, but remember, high speeds are for racetracks, not roads. ” 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. N 87 mph 140km/h. That particular character corresponds to a maximum speed of 130. The speed rating of a tire indicates the maximum safe speed at. Some tires have speed ratings of W, 168 mph and Y, 186 mph. A high-occupancy vehicle lane (also known as an HOV lane, carpool lane, diamond lane, 2+ lane, and transit lane or T2. The major difference between speed rating tires H and V is the tempo. ‍ Explore the true capabilities of the Michelin CrossClimate 2 tire. ** 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 Speed Rating Is the Letter Listed After Tire Size. Treadwear and durability. R 170km/h 4×4 & Bakkies Tyres. #6 · May 7, 2016. An H tire’s maximum pace operating under favorable circumstances is approximately 130 mph. Continental offers a six-year warranty for PureContact LX25. R: These tires are usually found on heavy-duty trucks, and their maximum allowable speed. There are no “I”, “O”, and “X” ratings. V 149. T is 118 miles per hour. The speed of the rating corresponds to its position. Q 160km/h Winter Tyres. Get to know your tire speed rating. 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. 225/50ZR16 in excess of 149 mph, 240 km/h 205/45ZR17 88W 168 mph, 270 km/h 285/35ZR19 99Y 186 mph, 300 km/h The 92 in my above example, indicates the load rating of the tire. H-rated tires can withstand. It’s important to look at both together because the speed rating depends on driving with the right load. W (ZR) 270km/h or 168mph. 300. 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. A polyester cord body increases ride comfort, and hardened bead fillers in the sidewall create added handling capabilities. Facebook. The distinction comes from the theoretical aspect of speed and the driving experience. 94w means 94 load rating and W speed rating. If you regularly drive on the highway at speeds above 130 mph, then you’ll need V-rated tires. Both H and V rated tires fall under the category of performance-touring tires, designed to provide better handling and. : EXAMPLES. Because manufacturers add speed to their vehicles, tire speed ratings continue to evolve to match the speeds. This rating represents a maximum speed of 130 mph, or 210 kph. As manufacturers continue to add speed to their vehicles, tire speed ratings evolve to match the speeds. With several ratings available, ‘H’ and ‘V’ are among the most common ones you might encounter. Speed Rating: H, V, W; Tires aren’t always a product that you get what you pay for. V & H Speed Rating offers 60,00 Mile Tread Wear Protection; W Speed Rating offers 50,000 Mile Tread Wear Protection; Cooper CS5 Ultra Touring Tire. g. U 200km/h Sedans & Coupe Tyres. W Speed Rating. The speed rating letter comes after the load rating.