I have IS 350 staggered rims on my GS430. The manufacture that I want to go with doesn't sell 255/40/18's. Should I go with another manufacture or can I run the narrower 245/40/18's instead. Thanks guys for the feedback.

 

If u really want to stay with the same manufacturer just go 245 instead of the non-existant255. 10 millimeter stretch is nothing when u think about it.