[LloydS]

Thank you for looking:

I have been reading multiple posts on the topic, and I've concluded that the overarching message is as follows:
"What wheel and tire size you buy for a 2014 CTS-V coupe depend on what wheels and tires you get."

Perhaps it is just my ignorance, and if so, please educate me by providing direction to the correct post I should be studying.

I aim to max rubber to the ground with zero clearance issues for fair weather daily post 650 to 700 RWHP (Mustang Dyno). I have read multiple posts stating that 20s are superior to 19s for clearance of internal components. I also have no intent to lower the machine as NH roads are Fing rough in the spring.

The rims I am focused on have been narrowed down to:

A) SV-F3 - Savini Wheels
B) https://forgeline.com/wheel/sp3s
C) https://www.elementwheels.com/staggered-set-ace-alloy-aff02-gloss-mica-grey-machined-flow-form

Any guidance that you could give on the right wheel/offset size to max rubber to road w/o any clearance issues or wheel well modification would be greatly appreciated. Tire guidance would also be appreciated if this impacts the equation.


Regards

 

[tinman]

Wheel Sizes

 

[RocketSled]

20's give you a bit more clearance, but they are a poorer tire for traction. For a tire to hook, it has to have some sidewall flex and the shorter the sidewall the less flex it can have.

Also, the shorter the sidewall, the less tolerant the wheel will be to potholes. Sidewalls give "compression". Shorter sidewalls are more likely to result in bent wheels on rough roads like we have in New England.

You can fit a 345 on the back of the car on a 19" wheel. This is what I'm running, along with 285s up front. I don't think it's possible to fit anything larger unless you're willing to have it poke out from under the fender lip.

I promised the person who sold me the wheels that I would not share the offset details. But as I'm driving a 14 Coupe, there's no question he has the right geometry and can sell you a set for your 14 Coupe. "Best Wheel Deals" in Florida. They're a Forum Vendor. Look 'em up!

Note: the second picture was taken after I dropped the car down off the jack, after mounting the wheels on the car. I hadn't driven it. The tires "settled down" once I'd rolled the car forward a bit, gaps closed up and the tops of the tires cambered in a little. So it looks like the tires are outside the fender lip, but they're not.

 

[MrSurly]

MT ET S/S 325/30/19s on a V2 Coupe, on *EDIT!* Z06 wheels !

original title of the thread was "305/35-19s on a coupe on 11" wheels Does anyone have that set up? Pics? Measurement possibly of sidewall to fender lip? I have ordered aftermarket wheels that are going to “poke” 14mm more than the stock wheel according to willtheyfit.com’s calculator. That’s...

www.ctsvowners.com

 

[LloydS]

Weld S81s Ordered:
Fronts - 18x9
Backs - 17x10.5

Now to figure out what Tires to toss on these bad boys...

 

[MrSurly]

and the offsets are?

 

[LloydS]

and the offsets are?

18x9.0 S81 5x120 mm 6.1BS (28mm offset) Black 3.18 ID High Pad

81HB7105N77A 17X10.5" Black S81 High Pad 5X120mm Bolt Pattern 7.7" Backspace

 

[MrSurly]

thanks. it’s good to have all the final info in the thread for future reference

 

[LloydS]

Any guidance on tires?

What I've got so far as guidance:
Rears - 305/45/17
Fronts (Primary Option) - 255/45/18, (Secondary Option) 245/50/18

If the sizes look right is question one. Two, what are my options for street tires?