Originally Posted by pKai

You can test Casey's statement by checking your actual speed with a GPS, if you have one. If it "took", your actual speed should be about 2mph slower than what the speedo and the Edge say your speed is. The Edge and the speedo should agree with each other in any case.
Mine was not taking at all (IOW, the Edge display was right, tire size remained wrong) until I did what I said above purely by chance.

Originally Posted by bluejay432000

I disagree, the Edge and the GPS should agree, my speedometer is 2 mph faster.