Tires, Mounting
Tires, Mounting
• Since MY 2005, all vehicles have a new disc wheels with revised contour.
• When mounting tires, tire dismounting/mounting machine must be equipped with tire mounting fixture intended for these wheels.
• If the tire mounting unit has not been modified, contact the equipment manufacturer.
Otherwise, there is a danger of damaging the disc wheel.
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).
The minimum mounting temperature for a tire should be between 15 °C and 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. 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.
• To prevent damage, only warm water or warm air (maximum 50°C) can be used to warm up a tire!
• 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, water will start to build. Wipe up the water with a cloth so that the warming process does not slow down.
Warm-up time:
• Using the example of a room temperature of at least 66.20°F and a tire temperature of 32.00°F or higher, the tires should be stored for at least 2 hours at least 66.20°F.
• 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!
• Make sure wheel rim is clean.
- Install a new tire valve using the (VAS 6459) - 1 -.
- Remove the valve insert.
- Inflate tire to approximately 3-4 bar, tire bead must slip audibly over rim hump when doing this.
- Install the valve insert.
- Check the tire pressure.
- Balance the tire.