Speeodometer readings and OEM wheel options

[HUK]

The sport package comes standard with 255/50-19s. The 20" wheel option (275F/315R) actually gives you a slightly smaller circumference, and the speedometer would then be off by 1.3% compared to the 19" setup.
Is there a factory setting / adjustment I can make to the odometer to compensate for the smaller circumference if I decided to upgrade the wheel package?

[Denalio]

Originally Posted by HUK

The sport package comes standard with 255/50-19s. The 20" wheel option (275F/315R) actually gives you a slightly smaller circumference, and the speedometer would then be off by 1.3% compared to the 19" setup.
Is there a factory setting / adjustment I can make to the odometer to compensate for the smaller circumference if I decided to upgrade the wheel package?

No adjustment. 1.3% will not make a difference that you could notice. Given that the speed registered by the odometer is 5.0 KM/H slower than the actual speed. I tested this against my GPS and the speedometer is consistently 5 KM/H slower than what the GPS speed reading is when traveling above 25 km/H.

[FSETH]

I would think Denalio is right. Probably not a significant difference worth worrying about.

Does anyone get speedometers recalibrated anymore?

By the way, how accurate are typical portable GPS speed readings?

[sprocket1200]

use this tire calculator to see if you can find a spec closer to original. I agree 1% means nothing and you will never notice it...

Tire Size Calculator - tire & wheel plus sizing