when the diameter of the tyres is bigger than stock, the odometer gets wrong, and needs to be corrected in the ratio of the revs/mile.
ex : my stock PATROL has 265x70 R16 tyres
if I now run 285x75R16 tyres, I need to go to the site below and enter my data for both
A better easy to use tyre size calculator. Use our tyre size calculator to find tyre diameter, width, sidewall, circumference, and revolutions per mile.
265x70R16 => 659 Revs/mile
285x75R16 => 615 Revs/mile
So my odometer is wrong by 659/615 = 1,072.
When I read 450 km, in reality I have driven 7.2% more km : 450 x 1,072 = 482 km.
However, since the speedo is optimistic by about 7%, the speed displayed is now more or less right !
And the odometer error is even worst if you have bigger wheels, like 35" in your case