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I'm curious too as it's tempting to go square tho I wish they supported 275.
Needless to say I'll give a shout out to the BF Goodrich G-Force Comp 2 A/S....
They scare me as they hang on at rates that make me pucker and the fear is once they break, we go curb side or worse....
Where is that skid pad when you need it!!?
I understand that by the specs, they should fit, they probably will fit.
I appreciate the help from people offering it, but I know how wheel fitment works, really I do. Unless you are talking about the exact wheels I want to try, it's not helping me, lol. There is more to a wheel clearing brakes than just width and offset. Spoke shape plays a big factor and is unique to each type of wheel.
While I have run 245's in the rear for years, I always run Dunlop ZI's, ZII's, Potenza RE11a's, etc. Currently on RE71R's. So it's usually a stickier compound. Never really had any issues with grip. Typically run 205's in the winter, but I will be on 225/45R17 Nokian R3's this year. Only had them on for a day so far, and they feel a bit loosey goosey. We'll see how they perform when the snow hits.
And the verdict is a No Go without a wheel spacer as the spokes hit the caliper!
Bare minimum is 7.00 mm creates an air gap but 11 to 12mm would be be closer to stock. This isn't exact as I threw in paint stir sticks and snugged two nuts!
The 8" fronts fit the rear NP.
Bottom line - F-Sport split 5 spoke 8.5" w/50mm offset is a no go on the front of the IS-350.
225/40/18 and 255/40/18 maybe oem oem spec but i dont like it. Front is too small and narrow for my liking. I'm looking to fit 245/40s or 255/35s all round.
Forgot to mention that the tire also had contact with the spindle near upper ball joint. Notice the clean spot here...
With 6mm of spacer we get this... Tire has little wiggle room to shift off center and not contact spindle.
Rear tire is 255/40 BF Goodrich G-Force Comp 2 A/S