In this setup, in the carcass, the cable plies radiate around the axis of the tire. For instance, in our example, “82” is 1047 lbs. The load index on a passenger-car tire is a numerical code stipulating the maximum load (mass, or weight) each tire can carry. Unauthorized use and/or duplication of this material without express and written permission from this blogâs author and/or owner is strictly prohibited. Some numbers on the sidewall are listed in metric while others are in inches. We will be using it as an example throughoutThis factor shows how sensitive the tireâs reaction to the texture of the road is. At high speeds, bias tires can also deform which can affect handling.This rating indicates the ability of the tire to handle a maximum speed corresponding to the maximum load, without suffering any deterioration in performance.In our example above, the width is 185mm.There are two organizations, Tire and Rim Association (TRA), and European Tyre and Rim Technical Organisation (ETRTO), that influence tire standards.When we use tire type âPâ or P-Metric, it means that the tire is made according to certain standards of the United States (drafted by TRA) for passenger vehicles.Tire size specifications are outlined by the numbers and letters found on the sidewall of tires.The tire width is measured from sidewall to sidewall of the tire. If you are interested in wheel construction more info you can find Casting VS Forging.. 16 – The number following all above is the diameter of the wheels in inches.In our particular case rim diameter is (16 x 25.4mm= 406.4mm). This is often referred to as crossply.By clicking "Accept All Cookies," closing this banner, continuing to navigate this site, or clicking a link you agree to the storing of first and third-party cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts.There could be additional parameters for 2 or 3 wheelers, buses, agricultural vehicles, etc.
The letter âRâ in the above example shows the tire construction type as âradial.âR or âRadialâ tires are the most popular style of tire out there. You can expand the table below to find your load index rating and the corresponding carrying capacity.Tire sizes will often start with letters. For example, an H rating has a maximum speed capability of 130 mph or 210 km/hr.
The bigger the value, the more load that it can bear when properly inflated. The first load index marks the load capacity when used as a single tire. The crown consists of plies that form a belt.Tires typically range from 70-126 for their load index. F: LOAD INDEX The two-digit or three-digit number that follows the gap specifies tire load index. Then multiply this by .65 and you get 5.5 inches, the sidewall height in inches.Some run-flat tires are identified with an F followed by the type of internal construction. ST tires should never be used on cars.Since the wheel mounts the tire, when we need to use a spare tire, the wheel diameter parameter will help us decide if the spare/replacement will fit on the wheel.© The Vehicle Lab, 2020. Tire load index or load rating is a numerical code on a tire sidewall which specify the maximum load the tire can carry at the speed indicated by the tire's speed rating under certain service conditions - specified by the manufacturer. Wheel-size.com to launch Wheel Size App for iOS. In other words, it’s sidewall height divided by tire width.If you’re interested in switching out your tires for a different look or performance need, a good place to start is to look at the codes on your existing tires’ sidewall. For instance, the M/C indicates that the tire is for motorcycles only. For example P, LT, T, and ST.LT or Light Truck are tires for towing trailers or have a 3/4 to 1 ton load capacity.Tires labeled âSTâ or Special Trailer are meant for trailers. It’s the height of the sidewall measured from wheel rim to top of the tread, expressed as a percentage of tire width.
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