CT4-V Blackwing Brake Clearance Measurements

[WONT TAP]

Some of you are working on aftermarket wheels for your CT4-V Blackwings. Here are some brake clearance measurements I took when our car was only two days old that might be useful to you.

 

[Jameson's Viggen]

How does that compare to the ATS-V? Is it only different in term of clearing the rear calipers? I am wondering what OEM wheels I could maybe use as winters.

 

[WONT TAP]

Everything seems to be same fitment as ATS-V sedan, except you will need more clearance on the outboard side of the rear brake calipers.

 

[Jameson's Viggen]

Everything seems to be same fitment as ATS-V sedan, except you will need more clearance on the outboard side of the rear brake calipers.

Does that meant ATS-V wheels wont clear in the back? If not, maybe have to run like a 10mm hubcentric spacer?

 

[WONT TAP]

We haven't test fit OEM ATS-V wheels on the Blackwing, so I'm not sure.

I had some custom ATS-V wheels that I was able to make fit via the use of longer wheel studs and some spacers.

 

[Soundman414]

We haven't test fit OEM ATS-V wheels on the Blackwing, so I'm not sure.

I had some custom ATS-V wheels that I was able to make fit via the use of longer wheel studs and some spacers.

View attachment 6954

Did you run XXX/30 – 19s, or did you keep the 35 sidewall? Do you know if a 35 sidewall would rub if one was to go up to 19s?

 

[WONT TAP]

I'm running P275/30ZR19 on the front, and P305/30ZR19 on the rear. I love how these fit the car!

 

[Throat Yogurt]

Did you run XXX/30 – 19s, or did you keep the 35 sidewall? Do you know if a 35 sidewall would rub if one was to go up to 19s?

Remember, the 35 is an aspect ratio, not a dimension. So the sidewall height of an XXX/30/R19 tire depends on what the XXX is.

 

[Dubbed.theB]

@WONT TAP What wheel widths and offsets are you running? (including spacer)
The front sits perfect, but (personal opinion) I think the rear sticks out a 1/2" too far.
I am also wondering if there is enough room inboard in the rear to tuck a wheel in and still be able to run the 295s I want to run with less poke than you have.
I plan to get custom offset wheels ordered.
Thanks!

 

[WONT TAP]

@WONT TAP What wheel widths and offsets are you running? (including spacer)
The front sits perfect, but (personal opinion) I think the rear sticks out a 1/2" too far.
I am also wondering if there is enough room inboard in the rear to tuck a wheel in and still be able to run the 295s I want to run with less poke than you have.
I plan to get custom offset wheels ordered.
Thanks!

My sizes and offsets aren't perfect, since we retrofitted wheels and tires from another application.

On the front we used 19 x 9.5" (+24), with 1/8" wheel spacers. On the rear we used 19 x 11" (+55), with 3/8" spacers. So our final sizes, including total offset work out to be 19 x 9.5" (+21) and 19 x 11" (+45).

You could use those numbers as your starting point. But I would still recommend working with a wheel specialist on this.

 

[Dubbed.theB]

How much clearance do you have on the 305s with the rear suspension?

 

[WONT TAP]

How much clearance do you have on the 305s with the rear suspension?

Seems adequate to us.

 

[1BadTundra]

My sizes and offsets aren't perfect, since we retrofitted wheels and tires from another application.

On the front we used 19 x 9.5" (+24), with 1/8" wheel spacers. On the rear we used 19 x 11" (+55), with 3/8" spacers. So our final sizes, including total offset work out to be 19 x 9.5" (+21) and 19 x 11" (+45).

You could use those numbers as your starting point. But I would still recommend working with a wheel specialist on this.

I'm looking at a 10.5" rear with a +42. Overall would tuck me in 3.3mm more than yours is in the back. I was going for flush, but I cant get that with concave. I guess I figured with a 1/2" less width and 3mm less offset I'd tuck more than that, I guess not. Here's my comparison to yours. 3mm is not even noticeable. I may bail on that size.