Question: How Do You Read Tire Size Numbers

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.

How do you read tire numbers?

What does the 265 70R17 mean?

How to read your tire size long description. An arrow points to the numbers 265/70R17 115T on the inner part of the tire sidewall. 265 is the width, 70 is the aspect ratio, R stands for radial, 17 is the wheel diameter and 115T is the load index and speed symbol.

How wide is a 245 tire?

245: The width of the tire, from sidewall to sidewall, in millimeters. A 245 is 245 millimeters, or 24.5 centimeters, wide. The tread width is actually somewhat smaller than the tire’s actual width. 45: Aspect Ratio.

Can I use 225 tires instead of 235?

Can 225 fit 235 tires? Yes, they can. 225 tires are 10 mm narrower and 15 mm lower in height than the 235 tires. Besides, 235 tires are wider than 225, and so we recommend checking the owner’s manual.

What does 50r mean on tires?

50 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 50 means that the tire’s section height is 50% of the tire’s section width. R indicates the construction used within the tires casing. R stands for radial construction.

What do all the letters and numbers mean on a tire?

The last grouping of characters, tied to the tire type, size and construction, represents the load index and speed rating. Also known as the service description, the number indicates the maximum load the tire can support when inflated properly, and the letter represents the maximum speed capability of the tire.

What size tire is P265 70R17?

265/70R17 tire size in inches. 265/70R17 tires are 31.6″ tall, have a section width of 10.4″, and fit wheels with a diameter of 17. The circumference is 99.2″ that translates into 638 revolutions per mile. As a rule, they can be mounted on the wheels with 17″ x 7-9″(LT Tires 7-8.5″) rim width.

What size tire is 255 70R17?

Tire Size Calculator – Tire & Wheel Plus Sizing BETA Unit: Imperial Imperial Metric Rim Diameter 17.00 in Rim Width Range 6.50 in – 8.50 in Overall Diameter 31.06 in Sidewall Height 7.03 in.

What does the 113s mean on tires?

113 is the load rating, it means the tires can handle up to 2535 lbs. S is the speed index, which means the tires can go up to a speed of 112 mph. The office is open between 9am and 6pm EST. Thank you for your interest. Priority Tire ✅.

Is there a big difference between 245 and 235 tires?

In selection width, there is a -10 or -4% difference between 245 mm old tire and 235 mm new tire. The circumference parameter, the difference between 2431 mm (old) and 2310 mm (new) is -121 mm or 5%.

What is bigger a 245 or 265 tire?

265mm is 20mm wider than the 245mm. Even if you could – you will have to replace them all with the 265 – and then you don’t know if the wider tyres will hit the bodywork of you car.

Which tire is wider 245 or 225?

There are two main differences in these two tire sizes: First, the 225 tire’s width is about little less than an inch less than the 245 tire (which means you will have less traction/gripping surface touching the road, so your vehicle will be difficult to control on the road).

Do bigger tires give a smoother ride?

Avoid bigger wheels if you want a smoother ride. As a general rule, bigger wheels result in a rougher ride. Switching to a smaller wheel and a thicker tire can give you a smoother ride without any major modifications to your car.

Can you put a wider tire on the same rim?

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.

How much difference in tire size is acceptable?

When changing tire sizes, we recommend staying within 3% of the diameter/height of the original tire. Any more than this and you face the risk of brake failure.

What does R17 mean on tires?

R17 on a tire means that the rim size needed would be 17″. The “R” actually stands for radial, not rim and is the type of technology the tire uses.

What does 99 mean on a tire?

The higher the tire’s load index number, the greater its load carrying capacity. 97 = 1,609 pounds. 98 = 1,653 pounds. 99 = 1,709 pounds. A tire with a higher load index than that of the Original Equipment tire indicates an increase in load capacity.

What does 98 mean on a tire?

The 98 says the tire can safely carry — when properly inflated — 1,653 pounds. This code ranges from 60 (551 pounds) to 114 (2,601 pounds). The speed rating (sometimes listed twice — in front of the R and always here) ranges from M (81 mph) to Z (149+ mph).