Pax Tires, Construction
It is mandatory for run-flat tires to have a tire pressure monitoring system in the vehicle.
PAX tires involve specially developed system that exhibits the following differences in comparison to conventional tires:
PAX Tires with Supporting Ring
-- -I- PAX tires with air
-- -II- PAX tires without air
-- The tire is anchored to a special rim that prevents it from sliding off when pressure is lost. The rubber supporting ring ensures stability in emergency operation.
It is mandatory for run-flat tires to have a tire pressure monitoring system in the vehicle. Refer to TIRE PRESSURE MONITORING SYSTEM .
- The inner and outer bead diameter are different sizes. This makes it possible to place the tire in a supporting ring.
- The tire is anchored to the rim differently.
- In this way, the tire height could be reduced considerably. That was possible because the area near the bead could be considerably smaller due to the special connection between the tire and rim.
- The tire bead is formed so that it can engage in the rim seat. Therefore, it remains firmly in the seat when pressure is lost.
- Rim flange
- Fabric shell
- Bead bundle
- Loop
- Fabric shell
- Bead bundle
- Rim flange
The secure seating of the tire in the rim is ensured in all driving situations due to the type of construction.
A wedge-shaped component of the tire is pressed between the bead bundle and rim when loaded. This happens independently of the pressure in the tire.
In contract to conventional tires, tires with emergency running characteristics (PAX) exhibit differences in regard to dimensions and designations.
Therefore, PAX tires can only be mounted on special rims (PAX).
- Width in mm: the tire width from flank to flank on standard rim (corresponds to width specification on standard tire)
- Outer circumference in mm: maximum diameter of a new tire
- Designated diameter in millimeters on standard rim seat
- Smaller bead diameter in millimeters: rim seat on outer side
- Larger bead diameter in millimeters: rim seat on inner side