What Does P235 55R18 Mean?

On this page you will find a detailed explanation of the P235/55R18 99T tire code. This number indicates the tire has a width of 235 millimeters. This number means that your tire has an aspect ratio of 55 %. In other words, your tire’s sidewall height (from the edge of the rim to the tire’s tread) is 55 % of the width.

What size rims 235 55R18?

You need the rim size of 18″ x 6.5-8.5″ for 235/55R18 tires.

How tall is a 245 55R18?

Tire Size Calculator – Tire & Wheel Plus Sizing BETA

Unit: Imperial Imperial Metric
Rim Diameter 18.00 in
Rim Width Range 7.00 in – 8.50 in
Overall Diameter 28.61 in
Sidewall Height 5.31 in

What does the R mean in tire size?

The first three numbers (205) indicate the width of the tire tread in millimeters. 60 is the aspect ratio or profile of 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.

What does LT mean on a tire?

If a tire size reads, LT235/75R15 104/101S, the LT indicates that this tire is meant for Light Truck use. These tires are made for light-duty and heavy-duty pickup trucks (typically ½ ton, ¾ ton, or 1-ton load capacity), SUVs and vans.

What diameter is a 235 60 18 tire?

The 235/60 18 tire has the following characteristics: a width of 235, a height of 60 and a diameter of 18 inches. These dimensions exist for summer tires and winter tires.

How do you read tire sizes? (video)


What does p245 55r18 mean?

This number indicates that your tire has a width of 245 millimeters. 55. This number means that your tire has an aspect ratio of 55%. In other words, your tire’s sidewall height (from the edge of the rim to the tire’s tread) is 55% of the width. In this case, the sidewall height works out to be 134 millimeters.

What does 105h mean on a tire?

For passenger vehicles, load index ranges from 75 – 105. “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.

How tall is a 255 60 r18?

255/60R18 Conversion

Metric Inches
Overall Diameter (Tire Height) 763 mm 30″
Tread Width 255 mm 10″
Rim Diameter 457.2 mm 18″
Sidewall Height 153 mm 6″

How wide is a 235 tire?

Comparison Table Between 225 and 235 Tires

Parameters of Comparison 225 Tires 235 Tires
Width 225mm 235mm
Tire Height 29.3 inches. 29 or 31.7 inches.
Treadwear Warranty 70,000 miles. 60,000 miles.
Gas mileage Use less gas and offers more mileage. Use more fuel and offers less mileage.

Are wider tires better?

There’s a reason why the majority of cars have wide rather than narrow tires. Overall, wider tires are better for dry surfaces and for high-performance vehicles. Greater surface area allows for better day-to-day traction and durability.

Can you put different width tires on 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.

Do I really need LT tires?

Because of their stiffer sidewall, LT tires don’t absorb bumps very well, causing more vibrations and road noise, particularly in lighter trucks and SUVs. That’s why we typically only recommend using LT tires on larger trucks, SUVs and vans, or for use in off-road conditions.

Are all LT tires 10-ply?

LT tires are usually 8-ply (Load Range D) or 10-ply (Load Range E). Passenger Tires usually have a 4-ply or 6-ply equivalent sidewall. The performance trade-off of this added weight is a harsher ride, less fuel efficiency, and less responsive handling.

Are LT tires more puncture resistant?

If a high load rating or tire resistance to punctures is high on your list LT rated is the best option.

How tall is a 225 60 r18?

This number indicates that your tire has a width of 225 millimeters. This number means that your tire has an aspect ratio of 60%. In other words, your tire’s sidewall height (from the edge of the rim to the tire’s tread) is 60% of the width. In this case, the sidewall height works out to be 135 millimeters.

What does 235 60R18 103H mean?

The 103H in the size description designates the load index (103) and the speed rating (H). In this example the load index of 103 indicates the tire will carry a maximum load of 1,929 pounds at maximum inflation and the H speed reading indicates that tire can perform at speeds up to 130 MPH.

What is 235 60R18 in inches?

235/60R18 tires are 29.1″ tall, have a section width of 9.3″, and fit wheels with a diameter of 18. The circumference is 91.4″ that translates into 693 revolutions per mile. As a rule, they can be mounted on the wheels with 18″ x 6.5-8.5″ rim width.

Can I use 245 tires instead of 235?

The quick answer is yes you can replace 245/50-18 tyres with 235/50-18 but they will have 10mm (0.4 in) smaller overall diameter. Will only slightly effect speedo and odometer – ie speedo will read about 1.5% high.

Do wider tires hurt gas mileage?

Increasing the width of a tire can impact fuel economy as well. Wider tires create a larger contact patch, the area of the tire actually touching the road. While this is good for performance, it can create a higher resistance to coasting, meaning that the engine will have to use more power and fuel to maintain speed.

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 are H and V rated tires?

H-rated tires are rated for a maximum speed of 130 mph. The V rating is the next rating faster, and V-rated tires are good to 149 mph. Both H- and V-rated tires are considered to be performance-touring tires.

Is 245 A wide tire?

A 245 is 245 millimeters, or 24.5 centimeters, wide. The tread width is actually somewhat smaller than the tire’s actual width.

What does 102V on a tire rating mean?

Speed Index

In the example of “P245/50R20 102V,” the V represents a specific maximum speed of 149 miles per hour. Different letters represent different maximum speeds, such as H for a maximum of 130 miles per hour.

What load index is Load Range E?

10 E

LT-Metric, LT-Flotation and LT-Numeric Light Truck Tires
Load Range Ply Rating Abbreviated
D 8 D
E 10 E
F 12 F

Which speed rating is better H or T?

The “T” or “H” on tires pertain to their speed ratings. A T-rated tire can withstand top speeds of up to 118 mph (190 km/h), while an H-rated tire can support up to 130 mph (210 km/h). It is important to note these markings and stay within those speed limits.

What is speed rating H?


If you recall from earlier, the “H” speed rating doesn’t appear after “G” but between “U” and “V.” It represents a maximum speed of 130 mph (210 kph) and is commonly found on sports sedans and coupes.

What size tire is a 255 70R18?

The 255/70R18 Bridgestone Dueler A/T RH-S has a diameter of 32.1″, a width of 10.2″, mounts on a 18″ rim and has 649 revolutions per mile. It weighs 43 lbs, has a max load of 2469 lbs, a maximum air pressure of 44 psi, a tread depth of 14/32″ and should be used on a rim width of 6.5-8.5″.

How tall is a 245 50r18?

This number indicates that your tire has a width of 245 millimeters. This number means that your tire has an aspect ratio of 50%. In other words, your tire’s sidewall height (from the edge of the rim to the tire’s tread) is 50% of the width. In this case, the sidewall height works out to be 122 millimeters.

What size is 255 65R18?

255/65R18 Tires – 18 Inch Tires | Tires Plus Total Car Care.

What does 235 on a tire mean?

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.

How many inches tall is a 235 tire?

15-inch Wheel Conversion Chart

Metric Standard
225/70/15 27.4″x 8.9″
225/75/15 28.3″x 8.9″
235/75/15 29.0″x 9.3″
245/75/15 29.5″x 9.6″

What are 235 tires in inches?

P-Metric Tire Sizes – P-Metric to Inches Conversion Chart

Rim Size P-Metric Size Actual Tire Height
15 Inch 235/75R15 28.9 inches
265/70R15 29.6 inches
16 Inch 225/75R16 29.3 inches
235/85R16 31.7 inches

Do wider tires slow you down?

Wider tires are heavier, which, as a consequence, adds more weight to the car. This decreases the car’s acceleration. With its large contact area, wide tires not only slow down acceleration but also cause hard steering and poor car handling.

Are wider tires worse in the snow?

When it comes to the winter season, there are definite advantages to fitting your wheels with wide tires over standard narrow tires. A wider tire equates to better performance on dry or wet roads and compacted snow.

Do wider tires make you go faster?

Larger wheel diameters can result in faster and more composed handling; however, it can also result in slower acceleration capability. While there are a few disadvantages for any vehicle when increasing the wheel and/or tire size, curb appeal usually outweighs them.

Can I replace 235 tires with 255?

In a word, NO. The vehicle was designed for the 255 width tire, and you will lose serious amounts of highway traction with a tire that is 20 mm narrower.

Why do smaller wheels accelerate faster?

Newton’s Second Law dictates that the force on an object is equal to its mass multiplied by its acceleration. So, increasing your wheel size will decrease the driving force from your wheels which will culminate in a decrease in acceleration of said wheels.

Do bigger rims affect suspension?

Putting larger wheels on a vehicle than the ones with which it left the factory can cause problems for a vehicle’s suspension and brakes even if lower-profile tires keep the overall diameter the same.

What does LTX mean on tires?

The LTX of the LTX indicates that this all-season tire is designed for light trucks and SUVs. When purchasing tires, it’s very important to know the exact dimensions necessary for your vehicle.

Are 10 ply tires better for towing?

To be completely safe when towing with your truck, you will need 10 Ply or Load Range E tires. The best 10 Ply tires for towing should be capable of at least 3,000 lbs of weight per tire and do it while giving you safe driving experience with a high amount of grip and traction.

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