Tire Size for Vehicles

by Contributing WriterUpdated June 12, 2017

The Harley-Davidson Street Glide Vehicles is a cruising style motorcycle. With standard equipment like a fairing to keep the wind off of you as you roll down the open road and hard pack storage above the rear wheel, this bike is designed Vehicles extended road trips.

Under The Hood:

 Tire Size for the 2007 FLHX


The 2007 Harley-Davidson Street Glide FLHX is powered by a V-Twin engine with a 95.18 mm bore and a 111.13 mm stroke. The motor has a 9.2 to 1 compression ratio and offers 1585 cc of displacement. Power is delivered to the rear wheel via a drive belt, and the gearbox offers six speeds.


The fork rake on the FLHX is 26 degrees with a 157.5-millimeter trail, and the wheelbase is 63.5 inches with a seat height of 27.3 inches. The front suspension provides 4.6 inches of travel at the front wheel, while the rear wheel offers two inches of shock absorption via its suspension mechanism.


This American-built highway cruiser rides on a MT90B-16 front tire and a MT85B-16 rear tire. In more simple terms, both tires are 16 inches in diameter, and 6.15 and 5.67 inches in width, respectively. The front tire of this motorcycle has a 72H speed rating, while the rear tire has a 77H speed rating, allowing it to safely cruise at speeds of up to 130 mph.

 Tire Size & Rim Guide

The Code

All tire codes will be in this configuration: 205/55 R 16 68 V, (possibly preceded by a P or LT, indicating passenger car or light truck respectively).

Width and Aspect Ratio

In the above example, "205" is the tire's width in millimeters and "55" is the aspect ratio. Aspect ratio (or "profile") is equal to the tire's sidewall high in percentage multiplied by the width (or 55 percent of 205 millimeters in this example, yielding a 112.75 mm tall sidewall).

Construction and Size

The "R" in this example stands for "radial," which is the belt arrangement used in the tire. The only other marking you'll see is "B" for "bias ply," but bias plies are extremely uncommon on cars. The "16" indicates the diameter of the hole in the tire, which determines the size rim it will fit; 16 inches in this example.

Load and Speed Rating

The last 2-digit number (68 in this example) indicates the tire's load rating, and corresponds to a load in pounds on a load-rating chart. The last letter is the tire's speed rating; the further down the letter in the alphabet the higher the tire's speed rating. This example's "V" rating signifies it as a very fast high-performance tire.

 The Tire Size for the 2003 Toyota Tundra Extra Cab

Available tire sizes

Your Tundra had three different tire size options -- 245/70/16, 265/70/16 and 265/65/17. The tire placard sticker in your driver door jamb indicates the tire size that the truck came with.

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