Run-Flat Tires Assembly Requirements

Run-Flat Tires Assembly Requirements

Warm up cold tires to the minimum mounting temperature.

• This applies also to ultra high performance tires (height- / width ration smaller/same 45% and speed rating symbol larger than/same as V).

CAUTION!
Minimum mounting temperature for a tire may not be below 15 °C or above 30 °C in the center of the tire.

• For injury-free mounting, the upper sidewall and the upper bead inside must be minimum 15 °C.

• The internal temperature is called the core temperature.

• Rubber is a poor heat conductor, and for this reason, a cold tire must exposed to a temperature controlled environment until the inner rubber layers have warmed up to at least 15 °C.

• The tire surface temperature during the warm-up phase is not a measure the inside temperature.

• So that the cold tires warm up as quickly as possible, never stack them one on top of the other; store them separated from each other so that the warm air can circulate around them.

• Never us a room heater or a hot air gun to warm up tires because the surface temperature will heat up very quickly to a critical temperature.

• With the exception of using warm water or warm air (maximum 50 °C), there is no other way to warm up a tire without damaging it!

• If cold tires (below 0 °C) are brought into a warm room (above 0 °C), a layer of ice will start to form on the tires. This layer of ice means that humidity in the warm air is condensing on the tire.

• Once the layer of ice starts to melt, wipe up the water with a rag so that the warming up process will not be slowed down.

Warm-up time:

• If the room temperature is minimum 19 °C and the tire temperature is 0 °C and higher, then the tires should be stored for at least 2 hours at a minimum room temperature of 19 °C.

• If the room temperature is minimum 19 °C and the tire temperature is below 0 °C, then the tires should be stored for at least 2.5 hours at a minimum room temperature of 19 °C.

Recommendations:

• If possible, let the tires stand in the workshop for 1 day before mounting them.

• Store the tires as high as possible on an insulated surface, pallet or something similar.

• Position the tires so that they can be surrounded by the warm air.

• Wipe off the sweat.

• Never heat the tires with a room heater or a hot air gun!