Tires makes big difference in ride quality. I went from Nitto Extreme 555 to Bridgestone RE730... about the same sidewall height... man! What a difference! It is much more bearable.

Nitto was hard as a rock when hitting potholes, bumps anything with sudden change in road. Bridgestone soaked it up and never jarring.

When I said sidewall thickness... that's because I went from 235-45R17 to 225-50R16... not the right 16" tire for E34... 3/4" too small but I want to use up the tire before I buy new set.

By the way, I got Eibach and Bilstein Sport... next step is thicker spring pads... I think this will cinch it. Old pad is so worn out.