Re: Paging Andi!
Steve Theodore said:
Andi,
Do you mind telling me what offset you have on the front and rear wheels, and what suspension mods you have (ie: coilovers)? Do you think I could run a similar setup with my current suspension which consists of Koni yellows and Eibach pro springs? I was originally planning on running the same size tires you are on 17x9.5 fronts and 17x11 rears (which I don't have yet) but I'd love to have that extra half inch front and rear. Thanks a lot man. 
Steve T.
According to James Razor at The Wheel Source (Forgeline), my front 17x9.5's were 43mm offset and my 17x11's were 47mm offset. With these wheels, the rear tires only touched the Eibachs when the car was in the air on a lift with the wheels hanging... and they only barely touched. Not an issue -- put the car on the ground and there was almost 1/3" of clearance at the spring. The frame rail was much more of an issue.. whenever I'd come in for balancing there would be an area of the wheelwell at the frame rail that had been polished by the tire, and I'd mallet it in a bit while they were balancing my tires (got some funny looks from the Discount Tire guys...). But it worked fine. Once I got the Tein coil-overs, the smaller diameter rear springs wouldn't even touch the 315s when the car was in the air.
Now I have CCW wheels. According to John at CCW, my front offset is is 44.5mm and my rear offset is 50.8mm. Now that I have the CCW's, my left rear 315 KD does touch the coilover spring when the car is on the lift, but not at any other time (the suspension geometry pushes the wheels out a lot as the car is put onto the ground.. at least 1/4").
Backspacing that I measured myself on the forgelines:
Front 17x9.5's: 6.91"
Rear 17x11's: 7.85"
Backspacing that I was quoted by John at CCW for my CCW's:
Front 17x10's: 7.25"
Rear 17x11.5's: 8.25"
What does this mean?
Fronts: Compared to my Forgelines, the CCW's have an extra 0.34" on the inside and 0.15" on the outside.
Rears: Compared to my Forgelines, the CCW's have an extra 0.4" of width on the inside and an extra 0.1" of width on the outside.
Seeing as how 315 KD's are *STILL* on national backorder, as they have been for almost a year now, I think I may be downgrading to a set of Yokohama AVS Sports next. Don't know. Either that or some cheap Sumitomo HTR Z's. Tire Rack's review isn't too great (~equal to the Kumho Ecsta Supra POS's) but I am not sure I want to spend KD-type-money for a tire that just ain't quite as good (AVS Sport). We'll see...
Regards,
Andi