Talk to me about your wheel/tire fitment with the 17s?
Fender rolling required, correct?
This is the final frontier for me in my autoX car. I've been on 15X8s for awhile and would love to switch to 17s for all the usual reasons -- 235s, wider range of competitive tires to try, gearing advantage on longer, faster courses, etc.
Your 17-inch setup is damn near exactly what I envisioned.
+1, I would love to swap out a set of those for My MSystems (staggered) come track days 
plus i'm curious how much rolling the rear took cuz my MSystems are 17x9 et22 and i want to run 245/35 on them
Offset will be your best calibration to determine if you want to flare or not obviously as it's directly related to the rubber sizing.
I
insist on using low offset wheels for a wider track and thus had to flare my fenders. Feel free to delve further into this topic via PM or in a new thread, I am all ears for input as I see 17x10 and 18x10 wheels making these cars do UNIMAGINABLE THING, but, I'm concerned of the caveat; wheel-bearing wear. I have replaced both front wheel bearings and I run approx minus 3.6deg of Camber which isn't much but this car was pretty much daily driven for a long time with the alignment settings "fixed."
Genesis -
Stock Fenders - 15x7 BBS - 205-50-15 - Falken Azenis
Stock Fenders - 16x8 e38 weaves - 225-45-16 BFG KDW - this is what started it the quest for flaring in the name of better grip as I was getting more into track/auto-x
BBS RKs up close - Dunlop Direzza - 235-40-17
Forged Square 17x8 M-Systems up close - Hankook RS2 - 235-40-17
E38 weaves - Hankook RS2 - 245-45-16
The fender roller "swings" freely on the hubs. I had to attach a spacer during the final work for both front and rear. There are no wheel well liners in the front or std brake duct channels.
There are other ways to achieve this end result, it all comes down to preference.
Let me know if I can be of any additional help?
I hope I didn't take this too off topic. I am trying to show the evolution of width/sizing/flaring to answer your questions. Mods, feel free to do what's best.
