[Nick8915]

Hi All - I am new to the forum, so apologies in advance if any terminology below is not used in the proper context. I just ordered my 2023 X3 M40i this past Saturday (Week 10 production ) , and I ordered it with the 21in 718M wheels and the standard Bridgestone Alenza Performance RFT's despite living in Central Pennsylvania. The car should be delivered around the end of March, so I'm hoping the winter weather and cold temps will be mostly gone by that point so I can drive the car with the performance RFT's and not have to worry about any tire issues due to cold/snow. This being said, I'm also thinking ahead to the Winter of 2023, and what I'm going to do from a tire perspective. My preference would be to not have to buy a set of winter wheels & tries and swap them 2x per year, so I have started looking into AS tires. I'd likely use the performance RFTs through September, and then get the AS tires put on at some point in October. Ideally I would like to go with Michelin Pilot Sport AS 4's, and after reading many threads within the forum, it sounds like there are a few sizing alternatives/options since these tires are not available in the OEM size. I've listed these options below, and wanted to gather feedback to see if one option is better/best when comparing all 3. Also, since the vehicle is AWD, will using any of the below 3 options mess with the Xdrive system/throw the all wheel drive off because the tires sizes are different from the OEM sizes?

-Option 1: 255/40 Front & 265/40 Rear (I think this is the X3M 21in sizing)
-Option 3: 255/40 Front & 295/35 Rear
-Option 2: 245/45 Front & 275/40 Rear

I also saw that the Michelin Primacy Tour AS is available in OEM sizing, so was wondering if anyone has any experience using these or had heard of any experiences with this tire on an X3 M40i?

Thanks in advance!

[Oldguysrule]

All 3 options should be fine for the X drive. Option 2 gives you a little more sidewall. That size is also available in Michelin Cross Climate 2.