Jeep 2008 Commander - Manual (Page 322)

Improper alignment will not cause vehicle vibration.
Vibration may be a result of tire and wheel out-of-
balance. Proper balancing will reduce vibration and
avoid tire cupping and spotty wear.
TIRE CHAINS
Only models fitted with 235/65R17XL (extra load) tires
have sufficient tire-to-body clearance to allow use of tire
chains. Install chains on rear tires only. Follow these
recommendations to guard against damage and exces-
sive tire and chain wear:
• Do not install tire chains or traction devices on ve-
hicles with larger than 235/65R17XL size tires. Tires
larger than this may not provide sufficient body
clearance with chains or other traction devices.
• Manufacturer recommends a cold inflation pressure of
38 psi (262 kPa) when using 235/65R17XL size tires for
this vehicle.
• Use SAE class “S” tire chains or traction devices only.
• Follow tire chain manufacturer’s instructions for
mounting chains.
• Install chains snugly and tighten after 1/2 mile (1 km)
of driving.
• Do not exceed 30 mph (48 km/h), unless otherwise
specified by the chain manufacturer.
• Drive cautiously, avoiding large bumps, potholes and
extreme driving maneuvers.
TIRE ROTATION RECOMMENDATIONS
Tires on the front and rear axles of vehicles operate at
different loads and perform different steering, handling,
and braking functions. For these reasons, they wear at
unequal rates, and develop irregular wear patterns.
These effects can be reduced by timely rotation of tires.
The benefits of rotation are especially worthwhile with
322 STARTING AND OPERATING