bbs370z

Stumbled across a nice set of p zero corsas off a 997 for cheap and can't really justify shelling out over a g for new tires since they tend to get eaten stupid fast. Specs are 235/35/19 and 305/30/19. I'm currently on hankook v12s 255/40/19 and 285/35/19 mounted on bbs rsgt 19x8.5 19x10. Current at stock height but soon swift springs/koni yellows with spc rear arms are going on. I know with a shorter sidewalls make for a much stiffer ride and by tire calculations make the speedo a bit off but anything else to take into consideration? I'm not worried about the rear since many of you run this size but the rather narrow front is the bigger question.

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