What does the R stand for in tire size?

This is indicated in percentage of the tire width. “R” stands for the construction method of the tire indicating the tire is a radial tire. The following two numbers (16) indicate the diameter of the wheel rim in inches. The next two or three numbers (94) indicate the load index of the tire.

Does the R in tire size matter?

For example, a tire with a speed rating "S" is rated for up to 112 mph, while a tire rated "R" is up to 106 mph. Remember that this isn't a recommended cruising speed, but rather the maximum speed that tire type can withstand. Of course, you should always follow legal speed limits on roadways.

What does R wheel size mean?

R indicates the construction used within the tires casing. R stands for radial construction. B means belted bias and D stands for diagonal bias construction. 17 The last dimension listed in the size is the diameter of the wheel rim, which is most often measured in inches. LOAD INDEX AND SPEED RATING.

What does R 18 mean on a tire?

When it says R18, it means that it has a radial-ply construction and it fits an 18-inch rim. A tire can only be installed on a wheel that is identical to its inner diameter.

What does 60 R mean on a tire?

60 is the two-figure aspect ratio. This percentage compares the tire's section height with the tire's section width. For example, this aspect ratio of 60 means that the tire's section height is 60% of the tire's section width. R indicates the construction used within the tires casing. R stands for radial construction.

How to Read a Tire Size

What does 55 R mean on a tire?

So “235” means that the tire has a nominal width of 235 millimeters. The following “55” is the tire wall height as a percentage of the width. So in our example, the actual height in millimeters would be just under 130 mm. Then comes the letter “R” as the identifier for radial tires.

What does R14 mean?

R14 means the tire is meant to fit on a 14-in. diameter wheel. The R means it's a radial construction tire, which refers to the direction of the tire's internal structural cords. These days, radial tires are the industry standard for passenger vehicles. The 82H is the tire's maximal load and speed rating.

What R rated tires?

R speed rating

Speed rating R allows for speeds up to 106 mph (170 km/h) under optimal conditions. Like Q speed rated tires, R rated tires generally prioritize a particular function or unique performance over maximum speed capability.

What does 45 R mean on a tire?

The “45” that follows is the aspect ratio - the height of the tire sidewall as a percentage of its width. In our case that means 10.1 cm. Next up is an “R”, which means “radial” – today, radial tires have almost completely replaced the cross-ply tires that were the standard design until the 1980s.

What does Z mean on a tire?

Some manufacturers will insert a “Z” in the middle of the tire size description (right after the aspect ratio) when the tire is rated at “W” or “Y.” And if a tire is rated in excess of 186 mph (300 kph), manufacturer's usually will list a “Z” within the size description, per industry standards.

What does H mean on a tire?

“H” represents the speed rating, which is how fast the tires can go based on their load capacity. This rating ranges from A – Z. “H” indicates a speed rating of up to 130 mph.

Can I use 205 60r16 instead of 205 55r16?

Yes. It will have a slightly lower sidewall height, but should work fine.

What does XL mean on a tire?

XL (or Reinforced) tyres are 'extra load' tyres – they indicate that a tyre is reinforced to be able to withstand a higher load than other tyres of the same size.

What does P mean on tires?

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.

Can I put wider tires on my stock rims?

As a general rule of thumb, it's safe to fit a tire up to 20 millimeters wider than stock on the original rim. The actual width of the tire will vary depending on the width of the rim: The tire will expand 5 millimeters for every half inch (12.5 millimeters) increase in rim width.

What does e mean on a tire?

For example, an “E” load range indicates that a tire is equivalent to a 10-ply construction tire. In realitly, this tire is not built with 10 plies, but rather one or two plies of equivalent strength.

What does 40r mean in tires?

The fourth and fifth digit, in this case '40', is located after the width digits. These show the height of the tyre as a percentage of the tyre width. In this case, the profile, sometimes known as the “aspect ratio” is '40', which therefore means that the height of the tyre is 40% of the tyre width.

How wide is a 245 45R18?

245/45R18 tires are 26.7″ tall, have a section width of 9.6″, and fit wheels with a diameter of 18. The circumference is 83.8″ that translates into 756 revolutions per mile.

What does r16 mean on a tire?

This is indicated in percentage of the tire width. “R” stands for the construction method of the tire indicating the tire is a radial tire. The following two numbers (16) indicate the diameter of the wheel rim in inches. The next two or three numbers (94) indicate the load index of the tire.

What does R and Zr mean on tires?

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. R indicates that the structure is RADIAL. So, VR indicates that the tyre has a RADIAL structure and a speed index equal to V.

What does speed rating R mean?

R — Up to 106 mph. S — Up to 112 mph. T — Up to 118 mph. H — Up to 130 mph. V — Up to 149 mph.

What does the R in 185 65 R14 stand for?

MRF ZVTS 185/65 R14 86H Specifications

14 inches, stands for the diameter of the wheel that the tyre is designed to fit. Radial construction.R stands for radial-ply construction.

What does 185r14c mean?

However some commercial vans can cause confusion as some may not include the profile in the tyre size. Instead the letter 'C' is used - i.e. 185 R14 C. The C on a tyre sidewall stands for commercial tyre and indicates that the profile of the tyre will be '80' – so in this example the tyre size would be 185/80 R14.

What is the meaning of 165 65 R14?

165 / 65 R14 79S

65 is the height of the sidewall from the edge of the rim to the tread or surface. Unlike the width, the figure for the height is a ratio and not a direct measurement. For this, it means the height is 65% of the width, that is 165 x . 65 = 107.25 mm or 4.22-inches.