Dumb question, but oh well

[AUbooBama]

if my wheels are 15% different on 1010tires.com, do I just multiply my miles by 1.15?

[TxFireman1972]

15% different what? Price? Width? Height?

[AUbooBama]

Tire Size Calculator - tire & wheel plus sizing
15% larger than stock.

[smotrs]

Actually, that will give you a rough estimate but a more precise method would be to drive a set distance, then divide that by how many miles or OD says. That will become your multiplier.

Example,
If you have a GPS or use Google maps and it says a set distance is 50 miles. But you drive that path and your OD says 48.5 miles. Then the math is,
Actual Distance / OD Distance = Multiplier
50 / 48.5 = 1.030927835051546 (1.03)

So now just multiply your OD or Speedometer reading by 1.03 to get a more accurate reading.