Tire Rating Guide

What You Need to Know. If youve ever wondered how old your tires its an easy bit of information to find out tires actually have a born-on date and its listed right on the tire itself.

How To Read Speed Rating Load Index Service Descriptions Tire Rack

A T rating indicates the tire is approved for speeds up to 118 mph 190 kmh under optimal conditions.

Tire rating guide. The most common speed rating letters range from L to Y. The reference number is 100 so a tire with a treadwear rating of 200 has a predicted tread life thats twice as long as the industry standard while a rating of 80 means a predicted tread life. The UTQG ratings for.

A higher number means longer tread life under proper conditions. Consumer Guide to Uniform Tire Quality Grading ALL PASSENGER CAR TIRES MUST CONFORM TO FEDERAL SAFETY REQUIREMENTS IN ADDITION TO THESE GRADES. Every tire has a speed rating and a load rating.

20 rows The speed rating system as it is used today was developed in Europe as a response to the. The load index on a passenger-car tire is a numerical code stipulating the maximum load mass or weight each tire can carry. The resistance ratings are A B and C.

Quick and Easy Guide to Load Ratingsbias-ply tires when heavier rated tires had a larger number of internal components. Need help finding the load rating on your current tires. When Z was introduced it was thought to be the highest speed rating tires would require.

Tire speed ratings come in the form of a letter that follows the load index value of the tire. Most radial passenger tires have one or two body plies and light truck tires even those with heavy-duty ratings 10- 12- or 14-ply rated actually have only two or three fabric plies or one steel body ply. The speed rating gives the max speed the tire is built for while the load rating represents the max weight of the automobile.

Tires can earn a rating of up to 800 in the UTQG system. As vehicles kept getting faster W Y and Y were introduced to provide a better indicator of a tires capability at speeds higher than 149 mph. In most cases even the most basic tires have a speed rating around 118 miles per hour and a.

Tires with speed ratings of W Y and Y can withstand the highest speeds such as those youd find when driving an exotic sports car of 168 to 186 miles per hour and above. An H speed rating indicates the tire is approved for speeds up to 130 mph 210 kmh under optimal conditions. How much its understated and why is up to them but you can figure that each company looks at everybody elses numbers for competitive tires and pegs their rating to that ballpark.

The temperature grades indicate what the tires resistance to heat is. Load C 6 Ply Rated Load D 8 Ply Rated Load E 10 Ply Rated etc. This terminology has officially been replaced with the letter load rating system.

The Temperature Tire Rating. T ratings are most associated with standard touring tires and everyday passenger vehicles like family sedans and minivans. For load range B tires ETRTO ISO-Metric standards specify the load index rating at an inflation pressure of 36 psi 250 kPa table below while P-Metric standards measure the load capacity at an inflation pressure of 35 psi 240 kPa.

Note that 27 are rated A 59 are rated B and 11 are rated C. 30 rows A tires certified speed rating is given a letter from A to Z ranging from 5kmh 3mph. The tread wear rating is listed as a.

The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course. This is an important rating if you typically drive long stretches in hot weather. Ratings for the quality of traction provided by the tire are between AA and C with AA being the best.

The are two pieces of data that will help you estimate how many miles you can expect from a set of tires. The durability of a tire varies depending on the tires speed rating which refers to the maximum speed a tire can safely carry the vehicles weight and payload in ideal conditions. The tread-wear rating and the tire mileage warranty.

A Guide To Tire Load Index And Speed Rating Tire America