The fronts for my work S1 are 18x7 +37.

I got a BBK wheel offset in the front. The previous owner put a 215/35/18 tire on the wheel. Can I up the tire to 40 series. With rolled fenders and lowered, would I have a problem? I just feel a 35 series seem too skinny for an 18in tire up front.

 

You should post this,in "Tires & Wheels"Forum,for the best answers!!!

 

Yes, you can use 215/40-18. The overall diameter is about 24.75" which is about the same with OEM diameter.

 

215-35-18 would be too small. Not enough profile.