Chrysler PT Cruiser Service & Repair Manual page 1724

22 - 12 TIRES/WHEELS
TIRES (Continued)
Fig. 19 Under Inflation Wear
1 - THIN TIRE TREAD AREAS
Fig. 20 Over Inflation Wear
1 - THIN TIRE TREAD AREA
WHEELS
DESCRIPTION - WHEEL
Original equipment wheels are designed for proper
operation at all loads up to the specified maximum
vehicle capacity.
All models use steel or cast aluminum drop center
wheels. Every wheel has raised sections between the
rim flanges and rim drop well called safety humps
(Fig. 22).
Fig. 21 Tire Repair Area
1 - REPAIRABLE AREA
Fig. 22 Safety Rim
1 - TIRE
2 - WELL
3 - SAFETY HUMPS
4 - FLANGE
Initial inflation of the tires forces the bead over
these raised sections. In case of air loss the raised
sections help hold the tire in position on the wheel
until the vehicle can be brought to a safe stop.
PT