An H speed rating is at the low end or at the start of the performance tire speed ratings. Once the highest speed rating a tire could have V used to represent a maximum of 149 mph 240 kph or more.
Department of Transportation DOT set the ratings scale shown below.
Tire speed ratings explained. Also avoid aggressive tread designs they may look cool but can generate lots of road noise. With an S tire the lowest rated in common use motorists should be able to go 112 mph safely-or at least be confident that the tire will not fail at that speed. Together the load index and speed rating form.
The rating is molded on the tire sidewall signified by a letter or two usually after the load index number. The tire speed rating is the maximum speed tires can safely carry a load the original weight of your vehicle plus whatevers in it for a sustained amount of time in ideal conditions. Using a P19560R15 87S tire size as our example the 87S at the end of the size represents the tires service description.
In short its the fastest speed a tire can handle before it no longer performs as designed. Differences in Tire Speed Ratings Explained speed ratings of tires and what speed ratings mean. Prior to 1991 tire speed ratings were shown inside the tire size before the R construction type.
A tires speed rating is an indication expressed as a letter code on the tire sidewall of a speed the manufacturer expects the tire to be able to sustain over a long period of time without coming apartThis is good information to have for a number of reasons some of which actually include the likelihood of you ever being able to sustain even the lowest of. A relatively new addition to the speed rating chart tires with speed rating W can achieve a maximum sustained speed of 168 mph 270 kph. SPEED RATINGS REFER TO MORE THAN JUST SPEED.
Per the TRA 2007 yearbook for tires having a maximum speed capability above 240 kmh 149 mph a ZR may appear in the size designation. This 65MPH test allows the tire to qualify as a high speed tire. The speed rating is a measurement of the speed at which the tire is designed to run for extended periods.
Service descriptions are required on all speed rated except for Z-speed rated tires manufactured. The Autobahns unlimited speed opportunities explain why many. Trailer Tire Speed Ratings Load Capacity 65mph.
Definition of Tire Speed Ratings. Every ST Trailer Tire you see on the highway goes through this exact same test regardless of tire size or manufacturer. An H speed rating signifies that this tire can be run safely at speeds of up to 130 mph.
Nowadays it means 149 mph but no higher. And the tires rated load capacities are customized when speeds exceed 160 kmh 99 mph for all tires up to and including a V-speed rating and when speeds exceed 190 kmh 118 mph for all tires that are Z-speed rated and above. While you likely will never encounter speeds beyond that of your tires capabilities its important to understand everything else a speed rating can tell you when making your purchase decision.
The speed rating of a tire indicates the speed category or range of speeds at which the tire can carry a load under specified service conditions. Speed Rating Explained 26082017 A speed rating is a letter or a combination of a letter and a number which implies to what extent the tire successfully dissipates heat. But tire makers test their own tires and assign their own speed ratings.
As a general rule tires with higher speed ratings also handle better at slower speeds. An H speed rating indicates the tire is approved for speeds up to 130 mph 210 kmh under optimal conditions. Keep in mind that tires receive their speed.
The higher the speed rating the better control and handling youll have at higher speeds. As manufacturers continue to add speed to their vehicles tire speed ratings evolve to match the speeds. A T rating certifies the tire to.
H speed rated tires are ideal for sport and luxury coupes and sedans but not typically considered full-fledged performance vehicles. The advertised load. M Up to 81 mph.
Buying tires General information Tires Buying Guide. The available codes were SR 180 kmh 112 mph HR 210 kmh 130 mph VR in excess of 210 kmh 130 mph. Contrary to the name speed ratings arent just about speed.
Tires with a speed rating higher than 300 kmh 186 mph are indicated by a Y in parentheses. On the sidewall of every tire youll find one of these speed rating codes. A tires speed rating indicates the optimal speed that the tire can safely maintain over time.
N Up. W- and Y-speed ratings are subcategories of the Z-speed rating. For example Z was the highest rated speed at 149 until W Y were used to match the higher speeds of exotic sports cars.
Generally speaking touring tires with lower speed rating S T or H ratings on the sidewall are optimized for more comfort instead of more speed its recommended to never go below the speed rating specified by the manufacturer of your vehicle. The speed rating system used today was developed in Europe in response to the need to control the safe performance of tires at standardized speeds. A service description identifies the tires load index and speed rating.
Unlike automotive tires all ST tires are tested and rated at by the DOT at 65MPH.
Typically the load indexes of the tires used on passenger cars and light trucks range from 70 to 126. The higher the Load Range the more weight carrying capacity of the tire.
Dual Tire Load Rating D E F G H J L.
Tire load range ratings. Multiply that by four tires 4 x 3297 13188 pounds to get your vehicles max load carrying capacity. The product of the load capacity of a single tire and the number of tires determines the load carrying capacity of all the tires combined. Both have a 4-ply rating but the Extra Load can support additional load at up to 42 PSI while.
The numbers give the load rating for the tire while the letter indicates the speed rating. A 24570R195 LR G is a larger tire and has a maximum load capacity of 4540 pounds at 110 psi when used in a single position. Tire Speed Rating.
The rating of 121 shows that it has a load capacity of 3297LBS. 750R16LT 214065 244080 LT22575R16 215065 247080 LT24575R16 238165 277880 LT21585R16 215065 247080 LT23585R16 238165 277880 3415110 875R165LT 207065 236080 950R165LT 244565 279080 8R175 275585 85R175 308590 9R175HC 825R15 3660105 3970110 5675125 10R175 4410110 11R175HC 1000R15TR 443095 4850110 6395125 8R195 270080. When you multiply that amount for a single tire by four your vehicles maximum load capacity would be 4940 pounds.
Special trailer service tires have load ranges of B C D or E which correspond to their specific ply ratings 4-ply rated 6-ply rated 8-ply rated or 10-ply rated. Trailer Service ST tires there are two load indexes branded on the sidewall separated by a forward slash. Still not sure how to find your tire load range.
Using P21565R15 85H as an example the 85 gives the load index also called the tire ply rating and the H is for the speed rating which tells you the maximum speed at which you should use the tires. Always remember to install tires that have a load index that is equal or greater than your original factory-installed. Multiply the maximum load rating printed on the tires sidewall by four tires then deduct the 20 percent WL safety margin.
The load rangeply rating branded on a tires sidewall identifies how much load the tire. So if your trailer tires have a load range of C then they can safely carry 3640 pounds depending on the tire manufacturers specifications. Tire Aspect Ratio.
LOAD RANGE PLY RATING A letter on the sidewall of a tire represents the load range. Never install tires with a lower load carrying capacity than the original tires that were factory installed on your vehicle. You see single axle trailer tires can carry 100 of the load rating.
104 corresponds to 1984 pounds and 101 corresponds to 1819 pounds. While speed rating is typically adjacent to the load index and outside of after the tire. Multiply that by four tires 4 x 1389 5556 pounds to get your cars maximum load carrying capacity.
So what is the true load. Generally speaking the higher the tire load index the more weight the tire can safely carry. On a double axle trailer you need to decrease the load range by 12.
Load index values range from a low of 70 to a high of 110 for passenger cars. With the almost obsolescence of the Load RangePly Rating metric tire makers have begun using a new measurement system known as Load Index. The load rating of the tire displays the weight a tire can carry.
For Load Range B tires ETRTO ISO-Metric standards specify the load index rating at an inflation pressure of 36 psi 250 kPa table below while P-Metric standards measure the load capacity at an inflation pressure of 35 psi 240 kPa. For example if a tire has a load index of 92 it can support 1389 pounds at maximum air pressure. Load Index is a numerical system that indicates a tires maximum load carrying capacity at the maximum inflation pressure.
This letter provides a comparative value of a tires strength helps gauge how much air a tire can hold and the weight carrying capacity. See a tire professional who would be more than happy to help. The load index on a passenger-car tire is a numerical code stipulating the maximum load mass or weight each tire can carry.
A 22570R195 LR G tire has a maximum load capacity of 3970 pounds at 110 psi when used in a single position. This speed ranges from 3 mph to 186 mph. A curb and destroying the rim and the tire is still holding air and I drove home on it as far as Im concerned these tires are awesome after reading reviews concerning durability of these tires I am a.
Tubeless Tube Type Load Range Load Range Load Range Load Range Load Range Load Range Load Range. If this number is less than the truck and trailers combined load youre. Using an LT23575R15 104101S Load Range C tire as an example the load index is 104101.
When looking at light truck LT or newer Special Trailer Service ST tires there are two load indexes branded on the sidewall separated by a forward slash. In the case of a tire with an 88 load index that tire would be able to support 1235 pounds at maximum air pressure.
