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Discussion Starter #1
Due to aftermarket companies setting up ctsvowners wheels wrong (or having to run major camber so doesn't stick out) I want to start a chart for the people here that has the RIGHT offset info

Things that I will need
1) Sedan/coupe/wagon
2) Wheel size/width and offset used
3) Tire brand/size used
4) Lowered or stock
5) Any rubbing issues
6) Aligned or not.


SEDAN
WHEEL SIZEOFFSETTIRE BRANDTIRE SIZERUBBINGALIGNMENT/LOWERED
19X9
19X9.5
+51
+58
YOKOHAMA
MT DRAG RADIAL
255 40 19
305 35 19
N
N
Set to more positive than oem. No issues. Lowered with eibachs
19x9
19x10
+36
+43
OEM TIRES255 40 19
285 35 19
N
N
More aggressive side
Lowered with eibahs
20x9
20x10.5
+35
+60
TOYO
PROXY
275 35 20
295 30 20
N
N
Normal Alignment
Lowered on cut eibach
...........................

COUPE
WHEEL SIZEOFFSETTIRE BRANDTIRE
SIZE
RUBBINGALIGNMENT

WAGON
WHEEL SIZEOFFSETTIRE BRANDTIRE
SIZE
RUBBINGALIGNMENT
 

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2009 CTS-V Sedan
Forgestar CF5
19X9 +36 front 255/40/19 tires
19X10 +43 rear 285/35/19 tires
Eibach sedan springs uncut
Aligned to agressive side of factory specs
No rubbing at all, ever.

View attachment 7402 View attachment 7406

As an aside - If you want to run 295 tires in the rear of a sedan, I would go in ~5mm on a sedan to a 19X10 +48. If you want to run a 10.5 rear wheel you will need to go to a 10.5 +54. If you have a wagon, you may need to go in a bit more, I don't have a wagon so I can't tell you exactly how much, but expect another 3-5mm. If you want to go 305s, bring it in another 3-5 mm on top of all that.
 

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2009 CTS-V Sedan
Forgestar CF5
19X9 +36 front 255/40/19 tires
19X10 +43 rear 285/35/19 tires
Eibach sedan springs uncut
Aligned to agressive side of factory specs
No rubbing at all, ever.

View attachment 7402 View attachment 7406

As an aside - If you want to run 295 tires in the rear of a sedan, I would go in ~5mm on a sedan to a 19X10 +48. If you want to run a 10.5 rear wheel you will need to go to a 10.5 +54. If you have a wagon, you may need to go in a bit more, I don't have a wagon so I can't tell you exactly how much, but expect another 3-5mm. If you want to go 305s, bring it in another 3-5 mm on top of all that.
You're Welcome...;-)
 

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You're Welcome...;-)
Indeed... and thank you. I measured it all myself and came up with specs very close to this. Then read you werent having any problems so I pulled the trigger. I also had Coupe rears on my sedan, which are 19X10 +40 They did not rub with the stock tires either, but wanted a little more breathing room.
 

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Discussion Starter #6
Coupe wheels look like shit on a sedan. Sticks out way to much.
 

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Looks like it'll be a great resource/sticky. What about the idea of adding a column for "Wheel Manufacturer" as well?
 

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Discussion Starter #9
Main thing im focused is on offset of the wheels since that will stay the same on any manuf if the wheel width is the same. I've been seeing to many ctsv's with rear tires that are so aggressive on offset and then putting a smaller tire to make it work not the idea either.

On the sedan 295 and 305 is what a lot of people want also something that has more tire contact on the ground then stock. Ill be widening my rear wheels to prob 10.25-10.5 the stock 19s ill put up all the info I can on that also
 

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I ordered Rennen R7 20x9 +43 front and a 20x10.5 +53 rear. I will be running Michelin Pilot Super Sports 255/35 20 front and 295/30 20 rear. I will let you know if I have any rubbing issues once the wheels are mounted. I have a sedan lowered on Eibachs.
 

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Discussion Starter #13
problem is also tires. Some brands are wider than others thats why I asked for tire brand/size on chart. Not all 305s are the same width
 

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255/35/19 and 305/30/19 Pilot Super Sports on stock Sedan wheels fit with no rubbing on uncut eibach's. they dont stick out, the factory alignment spec is used.
 

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Sedan

TSW Nurburgring wheels:
rear: 20x10.5, +65 and I run a 5mm spacer, so +60
fronts: 20x9 +35, no spacer

Tires: Toyo Proxes 295 30 20 in rear, 275 35 20 in front I believe

Lowered on eibach cut springs

no rubbing

no realignment
 

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255/35/19 and 305/30/19 Pilot Super Sports on stock Sedan wheels fit with no rubbing on uncut eibach's. they dont stick out, the factory alignment spec is used.
So it's interesting - the Michelin website notes that for the 305/30/19 the recommended wheel size is 10.5 to 11.5 inches, but you say this is OK on a 9.5? I mean, yes, it can be mounted ok, but why doesn't Michelin give a wider rim width range for this tire size? I'm honestly asking because I don't know. If we did know the reason, it might help us make better decisions about what the tradeoffs are. Anyone out there know what the deal is?
 

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Discussion Starter #20
So it's interesting - the Michelin website notes that for the 305/30/19 the recommended wheel size is 10.5 to 11.5 inches, but you say this is OK on a 9.5? I mean, yes, it can be mounted ok, but why doesn't Michelin give a wider rim width range for this tire size? I'm honestly asking because I don't know. If we did know the reason, it might help us make better decisions about what the tradeoffs are. Anyone out there know what the deal is?

its a better wheel to put it on but it still works on 9.5 just more buldge
 
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