Wheels And Tires, Mounting; General Information; Assembly Requirements - Volkswagen Jetta 2011 Repair Manual

Jetta 2011 ➤ , Jetta 2013 ➤
Suspension, Wheels, Steering - Edition 08.2015
3

Wheels and Tires, Mounting

⇒ "3.1 General Information", page 238
⇒ "3.2 Assembly Requirements", page 238
3.1

General Information

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.
WARNING
Otherwise, there is a danger of damaging the disc wheel.
If the tire mounting unit has not been modified, contact the equip‐
ment manufacturer.
3.2

Assembly Requirements

Warm up cold tires to the minimum mounting temperature.
Note
This applies also to ultra high performance tires (height- / width
ration smaller/same 45% and speed rating symbol larger than/
same as V).
WARNING
The minimum mounting temperature for a tire should be be‐
tween 15 °C and 30 °C (59 and 86 °F) in the center of the tire.
• For injury-free mounting, the upper sidewall and the upper
bead inside must be minimum 15 °C (59 °F).
• The internal temperature is called the core temperature.
• Rubber is a poor heat conductor. For this reason, a cold tire
must be exposed to a temperature controlled environment un‐
til the inner rubber layers have warmed up to at least 15 °C
(59 °F).
• 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 use 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 (122 °F)) can be used to warm up a tire!
• If cold tires (below 0 °C (32 °F)) are brought into a warm room
(above 0 °C (32 °F)), a layer of ice will start to form on the tires.
This layer of ice means that humidity in the warm air is con‐
densing on the tire.
238
Rep. Gr.44 - Wheels, Tires, Wheel Alignment