Go look at the tire, and that should help put you in the right direction. For winters(hopefully), you’re friend won’t be banging out every gear and driving more sensibly. So the easiest tire option is typically acceptable as long as it’s still within a reasonable radios of the stock tire.

Once you go out and look at the tires/wheels… You’ll need to do some leg work, so I leave you these links:

• www.bmwstylewheels.com
• https://tiresize.com/calculator/