Do your tires slip, if/when you launch it at full power?
Also, do you think it's possible to install 13.5 width tire with no rubbing? at +00 offset?
Only had tires for a week but have not experienced them slipping at all and we actually had some heavy rain this weekend and they performed well.
Specs from Yokohama say these are 12.8” wide and I had to trim the carpet liner on the rear liner for front fenders that were rubbing before the 1” Eibach front springs. I don’t think I would try 13.5” wide tires unless you went with even more front lift and/or a less aggressive offset.
Mine are 20x9 +1, but a wheel in the +10 to +20 offset would provide a little better clearance if you felt the need for a wider tire but then you have to consider clearing the UCA with the extra tire width. IMO an aggressive 12.5 looks great and clears well so wouldn’t consider needing wider