Quote:
Originally Posted by Thresherinc
OP Great looking wheels.
Word of warning, with smaller tyres, your speedo will be reading incorrectly and it may affect other stuff on the M5 too, not sure how the xDrive will take it, probably fine as they match front and back.
Wheel/Tyre size calculator
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Thanks for warning.
pbonsalb also explained this to me in another thread and I’ve reviewed those calculators.
Surprisingly I have found when I use Waze (which I use all the time) that the speedo on the app continues to match what the car speedo reads and I think Waze is calculating it independently via GPS.
Once I put the tires on I did go into idrive and select “other” among the tires selections. After that the car went through some kind of reset process that required driving that I thought was related to the TPMS but maybe somehow also addressed the speedometer? Not clear to me.
Car has been happy and driving great for maybe a couple hundred miles so far. It feels amazing, like a different car. Can’t tell if it’s the wheels or smaller tires or what but feels like the car is dramatically lighter and more nimble.