Terrific fitment guide! Have question, guide says you will get top of fenderwell rub with 245-40-18's on 9" wheel with 39 offset ? HSK 73 senior member in LA says he runs Michelin Pilot Sport AS in above size without rub? Says he has Blitz with 45 offset,but chart also says this offset will rub? Offset probably makes no difference since it is wheel diameter & sidewall height that causes this rub? Can you please enlighten me? Thanks!