Quote:
Originally Posted by tofufi
Even the difference between those tyre sizes is only 5% on the rolling circumference... a change from 55mph would theoretically now only show 57.75mph, not even close to 64mph!
Methinks there's something odd with your speedometer to be getting those readings  |
I put the extra difference down to the fact the 185/60s had about 2mm of tread left (so were closer to being 185/55) and the 195/65s were new.
Either way, my speedo is over-optimistic!
