﻿﻿What Does Z Mean In Tire Size // cadrugdetoxcenters.com

Jan 19, 2019 · People often ask "What do the numbers in a tire's size mean?" A friend of mine recently placed the following post on her Facebook wall: "Need some automotive help here. Will P225/60R16 tires fit a car that right now is 'wearing' LT215/70R16 tires?" The answers she got were as varied as could be. Read on for some clarification. A speed rating also has a letter code, and that is immediately after the width and aspect ratio. It’s part of the three-digit load/speed index. This is on the tire, immediately after the complete size designation. A Z-rated tire has no maximum speed — this rating is for more than 149mph. Ever wonder what the letter in your tire size means? For example, the "Z" in 245/45ZR17 or the "H" in 205/55R16 89H. This letter is the speed rating of the tire. Tires are tested in laboratory conditions under load by tire manufacturers to determine the maximum speed capability of the tire. The speed rating designates the maximum speed at which a properly installed and inflated tire can be driven on. In this example, the speed rating is Z which means it has the highest speed rating. Z rated tires will also have a W or Y speed rating indication after the load index which denotes the actual mph the tire is. Oct 08, 2006 · 195= Width of tire, in mm, at it's widest point not the tread 60= ratio of height to width aspect ratio also known as profile or series. R= Radial. 15=Rim diameter in inches. S=top speed 112 mph. T=top speed 118 mph. H=top speed 130 mph. V=top speed 149 mph. Zunlimited=top speed 149 mph. Zlimited W =top speed 168 mph. Zlimited Y=top speed 186 mph.

P-class tires include cars, SUVs, crossovers, minivans and smaller pickup trucks. LT means light truck tire, designed for vehicles that are towing trailers or have ¾- and 1-ton load capacity. ST stands for Special Trailer. These tire sizes are meant for trailers, including fifth wheels and other travel trailers, boat trailers and utility trailers. 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”. You may see tires without these tire numbers, meaning the tire’s profile is standard – 82%. Also, there are rarely tires with the ratio of three digits, which means it’s in millimeters. Jun 05, 2007 · As in over 150mph Back when I was a boy you had HR for upto 130mph, VR for upto 150mph and ZR for over 150mph. Gradually there were more "normal" cars capable of sustained speeds over 150mph so the additional "W" & "Y" grades were introduced. Tire Ratings and Sizes. Different sized tires on the rear of a vehicle affect the ABS braking system. This can result in the amber ABS warning light. The tire rating and sizing system are broken into easy to understand sections that describe size, load, and speed ratings.

Finding the tire size meaning in metric measurements is a little more difficult and usually take a calculator to get exactly right. Example B: 305/70R17 On metric tires the first number is your width of the tire in millimeters. In example "B" this reads 305mm. There are 25.4 mm in one inch. Explanation of Truck's Tire Size by Tim Plaehn. Understanding truck tire sizes is important for the safe transport of goods and people. Trucks and buses carry many thousands of pounds, and the tires must be correctly chosen to safely carry the loads. Transmission gearing and road speed are also affected by the tires.

ZR basically means the tyre is adapted for speeds above 149 mph. ZR tyres includes the speed ratings V149mph, W168mph and Y186mph. Before 1990, the manufacturers used "ZR" to mean high performance tyres before the ratings got refined with W, Y. Mar 06, 2019 · A "T" means it's a temporary spare. Some tires get a "Z" or an "F" attached to the radial indicator, denoting a Z-rated tire see service description below or a run-flat tire. 225 identifies the tire section width, which is the measurement of the tire from sidewall to sidewall in millimeters. This measurement varies depending on the rim to which it is fitted. There are 25.4 millimeters per 1 inch. 50 is the two-figure aspect ratio.