Kia Optima: Tires and wheels / Tire replacement

If the tire is worn evenly, a tread wear Indicator (A) will appear as a solid
band across the tread. This shows there is less than 1.6 mm (1/16 inch) 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.
The ABS works by comparing the speed of the wheels. The tire size affects wheel
speed. When replacing tires, all 4 tires must use the same size originally supplied
with the vehicle. Using tires of a different size can cause the ABS (Anti-lock Brake
System) and ESC (Electronic Stability Control) to work irregularly.
✽ NOTICE
- In order to maintain optimal driving performance, we recommend replacing
tires with the same specification and type as originally installed in your vehicle.
If not, driving performance could be altered.
- When replacing tires (or wheels), it is recommended to replace the two
front or two rear tires (or wheels) as a pair. Replacing just one tire can seriously
affect your vehicle's handling.
The wheels on your vehicle were aligned and balanced carefully at the factory
to give you the longest tire life and best overall performance.
In most cases, you will not need to have your wheels al ...
When replacing the metal wheels for any reason, make sure the new wheels are
equivalent to the original factory units in diameter, rim width and offset.
A wheel that is not the correct size may adv ...
Other information:
Components and components location
Components
1. Strut assembly
2. Insulator dust cap
3. Insulator
4. Spring upper pad
5. Strut bearing
6. Strut bearing pad
7. Bumper rubber
8. Coil spring
9. Spring lower pad
Repair procedur ...
Repair procedures
Removal and Installation
Do not disassemble the oil pump (A) from timing chain cover because it
is supplied as timing chain cover & oil pump assembly.
...