Unconventional CT4V-BW wheel fitment (Apex)

[Yllwwgn]

Hi, thought I’d share with the group… absolutely love the CT4V-BW and have never been a domestic guy (mostly German), but the handling, steering, and precision of the car absolutely sold me. Since I’ve never kept anything stock, I wanted to tailor the wheel setup more to my liking. I’m old school and like some sidewall to my cars, and didn’t want to sacrifice our car’s purpose, but also wanted to fill out the wheel wells a little more. The front oem 18” sizing is spot on, but the rears always looked a bit “small” to me. I got some Apex wheels but still wasn’t happy with the look… it was good, but I wanted SYMMETRY. Symmetry front to back, in terms of sidewall height, tire-to-fender-gap, and width ratio front-to-back. Again I didn’t want to compromise handling, and some trial and error and lots of calculations… here you go. Turns out GM designed the rear fender wells exactly 1” larger in diameter than the fronts… hence why 18’s look fine up front but small in the back.

The goal here was subtlety… hopefully hard to spot until I point it out.

Sorry for the multiple “similar” pics… wanted to show it under different lighting to be fully transparent. Yes, 255/35R18 front, 285/30R19 rear . Looks even more subtle in person. And before anyone asks, the PS4 rear in that size happens to have the same tread width as the oem 275/35R19 BW-spec PS4… so the cornering balance/grip balance has stayed the same.

 

[JLayer]

Any problems with speedometer or warning lights running staggered. I know your running 35 fronts and 30 rears but I didn't know if the newer ecms would throw a fit or not.

 

[Yllwwgn]

Zero issues whatsoever; the overall diameters of the oem rear setup vs the new rear setup are almost the same.
I tried a 295/30R19 for a few days and didn’t like it… the back was almost too planted mid corner at 9/10ths and felt almost more sluggish/sloppier is the best I can describe it.

 

[Melon]

It's nice finally seeing 19's on the CT4. I want to go to 19's F & R, but man, this setup looks excellent.

 

[1Evil55]

Bravo. That looks great. I did a similar setup years ago on a GS400. It really looks made for it.