ORWL = Outlined Raised White Letters. B, BLK, BW, BSW = Blackwall or Black Sidewall. W, WW, WSE = Whitewall or White Sidewall. XNW = Extra Narrow White Width.
What does W stand for on tires?
The letter W denotes the maximum speed rating, which translates 168 mph—not something intended for mom’s minivan. See our list of speed ratings below, which range from a low of “L” (just 75 mph for some off-road tires) to a high of Y (186 mph).
What does S and T mean on tires?
S/T tires are all season, street or sport truck tires. They are designed specifically for performance pickup trucks, sport utility vehicles, and crossover vehicles.
What do the codes on a tire mean?
The two-digit number that usually follows the tire’s section width tells us the aspect ratio, or tire profile measurement. … A lower aspect ratio means a lower-profile tire with a shorter sidewall, while a tire with a higher aspect ratio will have a taller sidewall and look more like a donut.Does the P matter in tire size?
If you see a “P” in front of the tire size displayed on a tire’s sidewall it is a P-metric tire. If there’s no P, it’s a Metric tire (also called Euro-metric or Hard-Metric). … The higher the load index, the greater the load-carrying capacity of the tire.
What does P mean on a tire?
P identifies your tire as a Passenger Tire. The P stands for PMetric. If your tire size starts with LT rather than a P than it identifies the tire as a Light Truck tire. … For example, this aspect ratio of 50 means that the tire’s section height is 50% of the tire’s section width.
What speed rating is S?
Speed RatingMaximum SpeedQUp to 100 mphRUp to 106 mphSUp to 112 mphTUp to 118 mph
How do I read tire codes?
The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire’s width. The bigger the aspect ratio, the bigger the tire’s sidewall will be.What does Zr mean on a tire size?
Tire Speed Rating Chart For tires with a maximum speed capability higher than 240 km/h (149 mph), a “ZR” may appear in the size designation. Tires with a maximum speed capability higher than 300 km/h (186 mph), require a “ZR” in the size designation.
Can I use ZR tires instead of R?The Z in ZR corresponds to an old label used by manufacturers to indicate that the speed index is higher than V, i.e. 150 mph. Thus, a ZR tyre has a speed index of V, W, or Y. … There is therefore no difference between a ZR or an R tyre with the same speed index.
Article first time published onWhich is better T or H speed rating?
A speed rating of T indicates that the tire can be safely driven up to 118 mph. A tire with an H rating has a higher limit — 130 mph — which means it can be safely driven faster than the tire with the 94T code. … Tires with an H speed rating are often mounted on sport or sport sedan cars.
What does 91W mean on a tire?
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, 270 km/h maximum speed.
What's the P in front of the tire size?
P stands for passenger vehicle tire. P-class tires include cars, SUVs, crossovers, minivans and smaller pickup trucks. LT means light truck tire, designed for vehicles that are capable of carrying heavy loads, towing trailers, or for those looking for an extra heavy duty option.
What's the difference between p225 and p235?
The difference between 225 and 235 tires is that the width of 225 tires is 225mm. On the other hand, 235 tires have a width of 235mm. … The diameter, overall form factor, and weight, etc., are usually less in 225 tires as compared to 235 tires.
Can I use 235 tires instead of 225?
Here’s a neat online calculator you can use to substitute different tread width and aspect ratios and see what it does to the diameter of the tire. In the case of the 225 vs the 235 the overall tire diameter increases by . 5″. Going with an aspect ratio of 55 on the 235 width tire (235/55r17) you come up with a tire .
Does tire speed rating affect ride quality?
Speed Ratings Refer to More Than Just Speed Speed ratings affect more than just speed, they also contribute to ride comfort, wear, and cornering capabilities. In general, the higher the speed rating, the better the grip and stopping power, but the lower the tread life.
What happens if you go faster than tire speed rating?
If you go way over the rating, or if you stay above the rating for more than a few minutes, the tire may fail, losing tread or blowing out. The speed rating is an estimate of how much heat the tire can handle before it is damaged. The heat buildup comes from the speed combined with the load.
Are higher speed rated tires better?
The speed rating tells you the speed the tire can safely maintain over time. A higher speed rating usually means you will have better control and handling at higher speeds – and that the tire can take the extra heat. As a general rule, tires with higher speed ratings also handle better at slower speeds.
What does r19 mean on a tire?
Diagonal. 19. The tire size was designed to fit rims or wheels that are 19 inches in diameter.
What does the P stand for in P205 55R16 89H?
For example let’s look at a Goodyear Eagle, P205/55R16 89H The manufacturer of the product. The model of the tire. P identifies your tire as a Passenger Tire. The P. stands for PMetric.
Can I use 60 instead of 65 tires?
Physically, yes they will fit. It is recommended to stay within 3% of the original tire size on the car though. The size you have is 3.09% smaller, so not recommended.
Are ZR tires run flat?
The range on Run-flats varies depending on the brand but it is approximately 50 miles in range. Should I stay with Run-flats? At ZR we would recommend that if your car is originally fitted with Run-flat tyres then your vehicle should stay on them.
What does ZR stand for?
AcronymDefinitionZRZirconiumZRZone Rating (baseball statistic; used to measure fielding ability)ZRZettai Ryouiki (anime)ZRFreezing Rain (Weather Symbol)
What's the difference between ZR 18 and r18?
The difference is in the way the speed rating is displayed. For these tyres, if the speed rating is above 149mph, then a ‘Z’ must appear in the dimension part of the notation, as well as the actual speed rating shown elsewhere.
When installing new rims and tires What is plus sizing?
Plus sizing is done by selecting equivalent overall tire diameters and load capacities to your original equipment—by pairing lower profile tires with larger diameter wheels. That way your speed and load rating will still meet the requirements set out by your vehicle’s manufacturer.
How do you determine tire load rating?
To roughly determine the load range capacity for each individual tire, take the vehicle’s gross weight and divide by four. If the vehicle gross weight is 4,500 pounds, each tire should be able to safely support at least 1,125 pounds.
How do you date code tires?
Remember that the last four digits of the code are the date the tire was manufactured. You can check the first two digits of the DOT code to know the week of the manufacturing. The last two digits will reveal the manufacturing year. For instance, when it was written in 0203, the manufacturing year was 2003.
What is Michelin ZR?
A: ZR basically means the tyre is adapted for speeds above 149 mph. ZR tyres includes the speed ratings V(149mph), W(168mph) and Y(186mph).
How long do high performance tires last?
High performance tires can last as little as 20,000 miles. Moving to a new climate may mean you need a new set, and picking up nails and other nastiness can mean immediate replacement. All we can say is to check the tread of your tires regularly—we recommend once a month.
What XL means on tires?
Some vehicles are equipped with “XL” tires. It doesn’t mean that they’re extra large, but it does mean that they are extra-load tires. The load index on these tires is much higher than a standard-load tire, which is why it is important to replace an XL tire with another XL tire.
What is 91W speed rating?
A Z speed rating still appears on some tires sizes (ex: 225/50ZR16 91W). In this case, “ZR” designates a maximum speed capability of more than 149 mph, while W indicates that the tire’s maximum speed is 168 mph.
