Originally Posted by Soleng
Originally Posted by Lordofthewings
Great idea, but doesn't the increased diameter (and therefore circumference) corrupt the speedo reading ?
Yes, now the speedo reads the correct speed. The circumference with 195/65R15 is almost exactly the same as 165/80R15 allowing me to use a weight-saving spare wheel from a 4/4.

Harald

Just under 1mph difference at 60mph. As I have mentioned before this website is great for comparing different tyre and wheels. https://www.willtheyfit.com/index.p...ze=15&wheel_width=5.5&offset2=30

I used it to check what offset I needed to clear the suspension and guards when buying new wheels.

As mentioned by others most car speedos read a little high, when I get a new car (or new tyres for that matter) I always get my son to check it as a passenger when I am driving. My Octavia reads 115kph at 110kph so I would sit at 115kph, the Outlanders reads 113kph at 110kph but unfortunately keeps flashing the speed on the heads up display if above the limit which is annoying on the highway. S o I either sit at 113 and try ignore the flashing or at 110 knowing I am really only doing about 107kph.