Background of OTR tyres

Many OTR tyres are not only used off-road. In many situations, vehicles also drive on hardened surfaces or public roads at above average speeds. In such cases, it is important to pay attention to the tyre’s speed marking. However, you must also keep an eye on other factors.

Speed marking

OTR tyres have a few speed categories: 
OTR tyres (including wide tyres)

  • Wheel loaders    up to 10 km/h    speed A2
  • Graders    up to 40 km/h    speed A8
  • Dumpers    up to 50 km/h    speed B
  • Cranes    up to 70/80 km/h    speed E/F

Unladen

A few important factors must be considered when machines drive at above average speed on public roads. For instance, one could try to protect the relatively thick and rigid OTR tyres against over-heating and other damaging effects. This can be done by making sure machines are unladen in such situations.

Tyre pressure and cooling

To make sure tyres do not suffer unnecessary damage, we strongly recommend taking a break after every hour spent driving on public roads; this will ensure the required cooling. 

Rubber mix


The wide range of uses have been considered by manufacturers and led to changes in the design of OTR tyres as well as the rubber mix. The compounds have been specified for:

  1. High wear resistance and high resistance against collisions and damage
  2. High wear resistance and high resistance against over-heating at high speeds
  3. A compromise between wear resistance and resistance against over-heating (on relatively flat surfaces)