Before we begin to discuss about the tire sidewall informations it's important to know standard which was used for designation.
1 - MAX. LOAD SINGLE 1549 kg (3415 lbs) AT 550kPa (80 psi) MAX. PRESS. COLD
2 - MAX. LOAD DUAL 1399 kg (3085 lbs) AT 550kPa (80 psi) MAX. PRESS. COLD
What is a light truck?
A light truck is a United States federal classification for trucks or truck-based vehicles with a payload capacity of under 4,000 pounds (1,815 kg). Light truck class includes:
- Vans - most mini vans and full sized vans.
- SUV's – Mini SUV's, Compact SUV's, Mid size SUV's, Full size SUV's, Extended length SUV's.
- Light duty pickup trucks.
In other countries words usage and meanings are quite different.
Two types of the tyre size designation can be found on a tyre sidewall, a tyre width expressed in mm and the tyre width expressed in inches.
1. The tyre width expressed in mm
All tyres for the commercial vehicles must be marked with a
Service Description located after the size designation (European regulation ECE-R54). The service description consists of
load index and
speed rating (e.g. 156/150 L).
Listed below are a few examples of the truck/bus tyre size designations.
Here is an example of the tyre size designation for commonly used truck tyre:
Tyre size designation can be found on the tyre's sidewall with information about tyre:
- Tyre width in inches or mm
- Aspect ratio – ratio of height to width
- Construction type
- Speed index - Maximum allowed speed
- Rim diameter
- Load index - Maximum load capacity
1. Radial motorcycle tyres - designation in mm
Metric tyre size designation is the most common designation system. For example:
There are three main tyre contructions:
- Bias ply (cross ply or diagonal ply)
- Bias belted