Kia Optima: Tire ReplacementIf the tire is worn evenly, a tread wear indicator will appear as a solid band 1/2 inch wide (12.7 mm) across the the tread. This shows there is less than 1/16 inch (1.6 mm) of tread left on the tire. Replace the tire when this happens.
Do not wait for the band to appear across the entire tread before replacing the tire.

Tire Rotation
Compact Spare Tire ReplacementDo not lie down
To reduce the chance of injuries in the event of an accident and to achieve maximum
effectiveness of the restraint system, all passengers should be sitting up and the
front seats should be in an u ...
Tire rotation
To equalize tread wear, it is recommended
that the tires be rotated
every 12,000 km (7,500 miles) or
sooner if irregular wear develops.
During rotation, check the tires for
correct balance.
...
Disassembly
1.
Disconnect the M-terminal (A) on the magnet switch
assembly (B).[REMY]
[VALEO]
2.
After loosening the screws (A), detach the magne ...