Speedo and Wheels

[Fraser]

Originally Posted by bigwave2255

from my experience with 19 inch rims and factory sized tyres at an indicated 100 kmph im really only doing 95kmph

actually across the whole speed range im really 5 k slower than indicated

Regardless of whether you're on 17s, 18s, 19s or 20s with the factory tyre sizes your speedo will overread. All cars do it by somewhere between 2-3% and 10%.