1 km/h (1% at 100 km/h?) isn't much. Tyres wear by about 1% during their life, and different brands probably also vary a little. Inflation will vary effective diameter.My mack roll off speedo reads 1kmh fast vs. the gps, so price isnt relevant, $250000 and it's still wrong
I'm sure it's the drive tires, but either way, same tire size that was on went back on.