Kia Optima: Tire Speed RatingsThe chart below shows many of the different speed ratings currently being used for passenger car tires. The speed rating symbol is part of the tire size designation on the sidewall of the tire. This symbol corresponds to that tire’s designed maximum safe operating speed.

Wheel Size Designation
Uniform Tire Quality GradingComponents and Components Location
Component Location
1. BCM
2. Ultrasonic sensor
3. Buzzer
※ Rear parking assist control unit function and buzzer are built in BCM
(bod ...
Downshifting
When you must slow down in heavy traffic or while driving up steep hills, downshift
before the engine starts to “labor’’. Downshifting reduces the chance of stalling
and gives better acceler ...
Description of ESC
Optimum driving safety now has a name : ESC, the Electronic Stability Control.
ESC recognizes critical driving conditions, such as panic reactions in dangerous
situations, and stabilizes the vehi ...