Moin Moin, I’ve been thinking all the time about changing from my 19’s performance line rims to the Dotz Suzuka in 20 inches; tyres 245/45. The usual computers to roll-off circumference, of course, now sound the alarm that the legally permitted tolerance is exceeded and the deviation goes negative. At 100km/h the speedometer then shows only 98,5km/h. Even cheese, but understandable. Actually, now the speedometer has to be adjusted. Only that I then again in doubt. In this case, the speedometer would indicate a higher speed than is actually appropriate. Now the question is: is the DS7 so smart, because oh so premium, and checks that independently/adjusts itself to the new roll circumference? I think of the tire pressure system. This only complains if the roll circumference on a wheel has changed due to the lack of air pressure. Can this in doubt the workshop with a snap of the finger in the middle of the wheel. Dear thanks in advance to you! Denny