How to Read Tire Size P205/70r16 Bsw as

Tire Size Explained: What the Numbers Mean

Tire size can be confusing. Some numbers on the sidewall are listed in millimeters while others are inches. Plus, the right size for your machine, truck, or trailer tin can differ depending on where and how you bulldoze.

You lot can see your original equipment tire size in your owner's manual or on the placard by and large located on the driver's side door jam. This is the sizing recommended past the vehicle manufacturer.

If you're interested in switching out your tires for a different look or performance, a good place to start is the numbers and other indicators on your existing tires' sidewall. Next, have a tire professional assist you lot determine a tire size range that will fit your vehicle and driving needs.

Tire Size Meanings

Here'southward what those numbers and indicators on the sidewall indicate and how to understand them:

A: TIRE TYPE The first letter in the code tells y'all what grade of tire it is.

P stands for double-decker tire. P-form 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 selection. These are oftentimes equipped on three-quarter or 1 ton trucks and SUVs.

ST stands for Special Trailer. These tire sizes are meant for trailers, including 5th wheels and other travel trailers, likewise as boat and utility trailers.

If there's no letter earlier the showtime number, y'all take a metric tire most usually referred to equally European size. Information technology'southward besides measured in millimeters but may accept a dissimilar load capacity than a P or LT tire.

B: TIRE WIDTH The three-digit number following the alphabetic character is the tire's width (from side to side, looking at the tire caput on) in millimeters. This may likewise exist referred to as the section width.

C: Aspect RATIO The forrard slash separates the tire width number from the ii-digit attribute ratio. The bigger the aspect ratio, the higher/taller the tire'due south sidewall, or "profile" as it's sometimes chosen.

The attribute ratio is indicated on the tire sidewall as a percentage. It's the pinnacle of the sidewall measured from bike rim to top of the tread, expressed every bit a percentage of tire width.

In this example, the attribute ratio is 65, significant the sidewall is 65 percent as high as the tire is wide. To become the sidewall height, take the tire width of 215 mm and convert it to inches (8.46). Then multiply this by 65% (.65). This gives you lot an reply of 5.5, the sidewall height in inches.

D: CONSTRUCTION TYPE This single letter tells you about the internal construction of the tire.

R is for radial tires, the industry standard for most tires today. They take better road grip, lower rolling resistance for better gas mileage, ride comfort and immovability than previous generations of tires. In a radial tire, the plies — layers of potent cords made of a blend of polyester, steel and fabric and coated with rubber — are laid perpendicular to the direction of travel.

D is for tires congenital with diagonal (crisscrossed) plies, called bias-constructed tires. They are also called conventional, 10-ply, or cross-ply tires. Some motorcycle and trailer tires nevertheless apply this internal construction.

Some run-apartment tires are identified with an F followed by the type of internal construction.

Due east: WHEEL DIAMETER This ii-digit number specifies bicycle diameter in inches. Information technology's the distance between the two bead seat areas (where a tire gets tightly sealed onto the bicycle).

F: LOAD INDEX The two-digit or three-digit number that follows the gap specifies tire load index. The load alphabetize symbol indicates how much weight a tire can back up, based on the following standard nautical chart. In our example, the load index is 89, which indicates the tire has a load capacity of ane,279 pounds, when inflated to the tire's maximum air pressure rating.

G: SPEED RATING The concluding letter is the tire speed rating. This indicates the meridian speed it'southward safe to travel at for a sustained amount of time. A tire with a higher speed rating tin can handle heat better and provide more control at faster speeds. The maximum operating speed of a vehicle is no more than than the everyman speed rating of all tires mounted on the vehicle. (Of course, yous should always bide by speed limits for safer driving.) Speed rating is usually, but not always, a single letter (run into the chart).

Tire Size Charts

Below you will notice several charts that volition help yous understand tire sizing numbers, including a load index chart and speed rating chart.

---

Buying New Wheels or Changing Your Tire Size?

A tire size calculator is a quick fashion to encounter whether the tire size y'all're because will likely fit your car, SUV, sports car, lite truck or crossover.

Just call back that is only an gauge. It'due south important to stay within the sizing tolerances of your vehicle. Tires that are the wrong size could crusade some pull in the steering wheel, rub against the suspension or body of your vehicle, reduce clearance on hills, or consequence in a stiffer or noisier ride.

If you're because mounting a different tire size on your vehicle, check with a tire expert. Discover out whether the tires and wheels you take your eye on are the right fit for your vehicle's suspension, gearing, and bodywork. And enquire how whatever differences in revolutions per mile, tire speed, load index, and speed rating will affect your ride quality and vehicle performance.

See how new tires and rims volition look on your auto or truck using our Virtual Wheels simulator, available at any Les Schwab.

Find Your Store

wilsontwongive.blogspot.com

Source: https://www.lesschwab.com/article/tire-size-explained-reading-the-sidewall.html