Using comand to change tyre sizes - does it change speedometer, too?

[Swotty]

Hi,

Am finalising new wheels & tyres for my W215 600TT and going up to 19" and would like to keep the 40 tyre profile on the rear for a softer ride -but this increases the car's real speed by 3mph at an indicated 60mph.

I know you can change the tyre profiles in the comand system but does this just change the Nav calculations or does it recalibrate the car's speedo too?

I know it's a daft question as surely it must do so ......... but I wanted to know - just in case .......... officer!

Thanks,

Stuart

 

[mercedescl500]

Hi,

Am finalising new wheels & tyres for my W215 600TT and going up to 19" and would like to keep the 40 tyre profile on the rear for a softer ride -but this increases the car's real speed by 3mph at an indicated 60mph.

I know you can change the tyre profiles in the comand system but does this just change the Nav calculations or does it recalibrate the car's speedo too?

I know it's a daft question as surely it must do so ......... but I wanted to know - just in case .......... officer!

Thanks,

Stuart

Hi, It will have no effect on your Speedometer. Only your satnav. HTH.

 

[Swotty]

Thanks - back to lowering the tyre profiles, I guess!

Stuart