Hi guys,

I am currently running 235.40.18 on my 04 A4 UltraSport. Can I go up to a 245.40.18 on my stock 18" rims, or will they rub. Let me know. Thanks!

 

you can probbly do it on the rear, but no hope in hell on the front without rubbing. i know some guys are running 255/30/ZR19...i know different rim size but still. Front you can go 235 max without rubbing.

 

Thanks Sonic,

I'm going to stick with the stock rubber size. Thanks for the info!

 

I'm not sure you would rub. I run a Toyo 235, which I think generally have a wider section width then other 235 tire and am lowered with 8mm spacers in the front, with no rubbing.

245/40 vs 235/40 is 4mm taller in profile and would stick out around 5mm.

Not sure why you want to go to 245/40, but if you are looking to have your tire look beefier, some brands have larger section widths than others. I went from a Pirelli to Toyo and was surprised of how much wider it looks.

 

I have no real reason to go up, other than I saw a good deal on tires in that size.

 

i am running 245/40/18, stock USP.