Bottoming out with a race car, particularly on bumpy tracks, or at the very end of a high speed straight, can be ignored as long as it is not affecting your top speed or handling performance.

If your car is scraping along a lot, causing you to lose speed or control in corners, you should adjust the setup.

Change only one setting at a time in small increments.

From more to less influence:

• Increase overal ride height
• Increase front and rear packers
• Increase front and rear 3rd spring stiffness
• Increase front and rear fast bump dampers

Note: not all of the above options are available in all of the cars in Le Mans Ultimate!

Increasing the ride height will help with bottoming out the most, but at the same time will also have the biggest impact on handling of the car as its center of gravity is also shifted higher. Although if you are bottoming out a lot this is a compromise you will most likely have to make.

Adding packers to the suspension will prevent the suspension from compressing as much, and thus not allow the cars body to go as low and prevent it from bottoming out. Although by doing so, you will also be impacting the cornering performance, as you're working with a shorter and harder spring.

Increasing the 3rd spring stiffness will prevent both wheels on the same axis from compressing it as much and will help with slight bottoming out. While it still does impact the cars cornering performance, it is to an extent less impactfull than other options.

Hardening the fast bump dampers can help with bottoming out as they wont allow the suspension to compress as quickly, but will help only in slight bottoming out situations. Adjusting fast bump dampers will of course also impact cornering performance over bumpy track or curbs.