Speed on odometer is higher (15-18kmph) Qx70 actual

O

obaidjaved

Member
Car
QX70
Name
Obaid
I own a QX70 2015, the tire size I am using is 275/45/20 whereas the stock tire on the manual is 265/50/20. The odometer is showing ~15 -18 kmph more speed than actual. I have verified from GPS speed, and obviously I can't drive on fast lanes as everyone wants to overtakes since I am driving below the speed limit.
I have checked the difference of speed becs of change of tyre size from stock and it stated the difference should be about 3kmph only, but mine is approximately 15-18 kmph.
Also, the previous owner has changed the tyres recently (approx 15k kms old), but the tyres are Chinese (Horizon).

Any suggestions what would be the reason? Should I get the new stock tyres? Or there could be other reason?
 
Interesting. The tire size difference that I calculated was about 6kmph. My guess it would be the odometer out of spec. Can you confirm if the speedometer was accurate with stock tire size?
 
My 09 consistently reads 6 km/h too high. I just consider it a feature that keeps me from getting speeding tickets
 
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