system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do modern vehicle speedometers work? Tire rotations per minute?
gpt
Yep, tire rotation. Knowing the diameter of the tire and multiplying that by pi gives you the distance traveled per rotation. That means that if you do anything to increase the diameter of your wheels, you need to also get your odometer adjusted, or else you will actually be driving faster than your car thinks you are going.