It doesn’t state the optimal pressure for a tire mounted on a particular vehicle – that is found on a placard mounted on the vehicle or in its owner’s manual.

Tires and wheels that have a rim diameter expressed in "half" inches (8.00R16.5LT, as well as, 14.5, 15.5, 17.5 and 19.5) are used on some heavy-duty trailers, heavy-duty light trucks and box vans.

This results in size designations such as 225/45RF17 91Y (for self-supporting run-flat tires that have a speed rating identified in their Service Description and 255/40ZRF20 (for Z-speed rated self-supporting run-flat tires in which the speed rating is contained in the tire size). So, 55 profile is 55% of the width, meaning the tire’s height is (taking the width of 205 mm) 112.75 mm or 4.4”.

no not recommended, yes performance was still stellar. An LT appearing at either the beginning or the end of the sequence indicates the tire is a “light truck” tire, or a tire designed to be used on vehicles that carry high loads or pull heavy trailers. Some tire tread patterns are designed for rolling in a unidirectional way, meaning in only one direction. By continuing to browse our website, you agree to use these cookies. I get a number of calls from guys telling me that they want some 60 series or 50 series tires. Some cars and trucks can fit a larger tire in the wheel well than the Original Equipment…some cars…, …owner) mean that we cannot be 100% sure that the size the computer says is on your car is what you actually have installed on the car. If the R in the size was replaced with a D (225/50D16), it would identify that the internal tire body plies crisscross on a Diagonal and that the tire has a "bias ply" construction. The most common tread pattern in use on passenger tires is the symmetric tread pattern.

"The tire size branded on the sidewall provides a significant amount of information about the tire's intended purpose, dimensions, load capacity and high temperature/high speed durability.". You probably know what tire tread is: the part of the tire that makes contact with the road surface. For more information on what cookies we use and how to manage these cookies please visit our, 8 character minimum; 1 lower case, 1 upper case, 1 special character (# not allowed). We fitted it with the Kumho Ecsta SPT, an Ultra High Performance Summer tire.

and snow means in 4PLUS inches and falling.

summer, rain, winter...and yes snow %28despite that theyre only summer tires%29.

Radials became the dominant type of construction because of their superior fuel economy, traction, ride comfort and especially tread life when compared to earlier types of construction.

The tire size branded on the sidewall provides a significant amount of information about the tire's intended purpose, dimensions, load capacity and high temperature/high speed durability. …order tires for is the Cadillac SRX. The 91S represents the tire's Service Description.

Choose an Independent Recommended Installer. It has either a 17- or 18-inch staggered tire size, meaning a different size front-to-rear.

Every tire sold in the United States is required to include a US Department of Transportation (US DOT) Tire Identification Number on at least one sidewall. If you have not looked closely at a tire before,…, …17" wheel option equipped with a 215/70R17 tire.

What do they mean? Need help choosing the right products for your vehicle? In Europe, some highways have speed limits higher than those in North America – and a few have no limits at all.

In the example above, the aspect ratio of our tire is 65, meaning that this tire… Speed ratings on tires are expressed in letters and are generally listed along with the load index for a tire after the size,…, Occasionally I get requests for tires that are “one size bigger.” To some drivers, bigger means wider, to others (usually 4WD truck owners) it means taller in overall diameter. I can't help these guys if they don't know how tall a tire they need for their application.

For more information on Service Descriptions, click here. Many opt for a value-oriented Kumho tire. Tires with a symmetric tread may use any type of rotation method – front-to-back, modified X or full X. In these types of patterns, the inner and outer halves of the tread are designed with different channels and tread blocks. It’s important to understand that tires come in many different sizes that can determine the tire’s performance, their suitability for your specific vehicle, and their overall appropriateness for your driving needs. Nitrogen Tire Inflation: Why Would I Use Nitrogen? Simply put, the speed rating is the maximum speed at which a set of properly inflated tires may be driven. Knowing if your car has TPMS will enable you to find the right tires. Will the new size throw off my speedometer/odometer? The 50 indicates that this tire size's sidewall height (from rim to tread) is 50% of its section width. Tire Tech Information - Spare Tire Extinction?

Take a closer look at how nitrogen functions in tire inflation and why some drivers might find nitrogen tire inflation to be preferable to air. Michelin initiated millimetric sizes for their TRX tires that saw limited use on many different car models in the late 1970s and 1980s. These letters are followed by a sequence of 8-13 letters and numbers that denote that tire’s manufacturing location, its specific size, and the manufacturer’s identifying code.

Tires branded with the "LT" designation are the "little brothers" of 18-wheel tractor-trailer tires and are designed to provide substantial reserve capacity to accept the additional stresses of carrying heavy cargo. LT = If a tire ends with "LT," it signifies the tire is either an earlier "Numeric", "Wide Base" or "Flotation" Light Truck size designed to be used on vehicles that are capable of carrying heavy cargo and towing trailers (Numeric sizes), use 16.5-inch diameter rims (Wide Base sizes) or are wider, over sized tires designed to help the vehicle drive on top of loose dirt or sandy surfaces (Flotation sizes). Carrier charges may apply for receiving text messages. In the example above, the aspect ratio of our tire is 65, meaning that this tire’s height is 65% of its width. Not every tire that is listed in each category will be available in the size needed for your vehicle.

In the 17-inch sizes, the Kumho Solus KH16 is popular and in the 18-inch size it's the Kumho Ecsta STX KL12. Next you will find a slash and then another set of numbers: the aspect ratio, sometimes called the tire’s “profile”. Information on the materials used in the tire’s internal construction is listed next to the DOT code. The 225 indicates this tire is 225 millimeters across from the widest point of its outer sidewall to the widest point of its inner sidewall when mounted and measured on a specified width wheel.

By converting the 225mm to inches (225 / 25.4 = 8.86") and multiplying it by 50% (.50) we confirm that this tire size results in a tire section height of 4.43". Take a look at your current Acura tires to determine what size…, …driven.The tires have only experienced a little tread wear after the 7,200 miles test course, this means the tire manufacturers need to extrapolate their data from the test run and give their interpretation of how long their tire will last in relation to the course monitoring tires.

Enter your tire type and model,if it applies.

Let’s look deeper at both the elements of tire tread patterns as well as the three types you might run across in your search for new tires: Symmetric tread, asymmetric tread, and directional tread.

The common indicators are as follows: P = When a tire size begins with a "P," it signifies the tire is a "P-metric" size that was designed to be fitted on vehicles that are primarily used as passenger vehicles.

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