[starlights]

I will soon be installing staggered 20" 740m wheels (275/45 + 305/40) N-RFT Michelin AS3s. I am wondering which tire setup should I select in iDrive. The tires are A/S but the iDrive setting for 305 is for summer tires.

Considering that these are 20" tires, is it best to keep A/S 275 square setting?

Thanks for any advice.

[eelnoraa]

I think iDrive only change the criteria for tire pressure. It doesn't know what you are using as long as diameter of 4 corners match.

But I want to ask why 305/40R20 for rear. Most if not all BMW, stagger setup is for look, no other advantages I can think of, and a few disadvantage including more understeer, remove the capability of rotation.

Edit:

Oem 20” square wheel is 9” wide. 275mm tire width is close to the max width tire. 305m may not be possible at all. It does somehow depends on the brands and model of the tires. Please check before buying 305

[nZtiZia]

Originally Posted by starlights

I will soon be installing staggered 20" 740m wheels (275/45 + 305/40) N-RFT Michelin AS3s. I am wondering which tire setup should I select in iDrive. The tires are A/S but the iDrive setting for 305 is for summer tires.

Considering that these are 20" tires, is it best to keep A/S 275 square setting?

Thanks for any advice.

IIRC, TPMS only asks for the front tire size, then it will automatically select the rear tire size