How do I check the tire tread on my BMW 7 Series?

I recently purchased a used BMW 7 Series and want to make sure the tires are in good condition. What is the best method for checking the tread on my tires to ensure they are safe for driving?

You can use a tread depth gauge to measure the depth of your tire treads. Make sure to measure multiple points on each tire to ensure consistency.

Alternatively, you can use the penny test. Insert a penny into the tread grooves with Lincoln's head facing down. If you can see all of Lincoln's head, then it's time to replace your tires.