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2005 CTS 3.6 Base
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Discussion Starter #1
Its time to start purchasing some new wheels for the cts. Im very stuck on the Ground Force GF07 wheels. they are 19x8.5 for the front with 35/40/45mm offsets and 19x9.5(concave) rear with 40/45mm offsets. http://www.elementwheels.com/proddetail.asp?prod=gf71985blkgf71995blk They look a lot like the forgestar wheels i see a lot of V guys are running and im really digging the look of the rear concave wheel. i found a few cheaper in the same style in 19s or 20 but i keep coming back to these. anybody have pics of their cts with 19's and V suspension? how do you like the ride and handling? im thinking of running 245-35-19 front and 275-30-19 rears, will these fit nicely without rubing or rolling the fenders?
 

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2006 3.6L CTS, Hotchkis Sway Bars, FE2
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Its time to start purchasing some new wheels for the cts. Im very stuck on the Ground Force GF07 wheels. they are 19x8.5 for the front with 35/40/45mm offsets and 19x9.5(concave) rear with 40/45mm offsets. http://www.elementwheels.com/proddetail.asp?prod=gf71985blkgf71995blk They look a lot like the forgestar wheels i see a lot of V guys are running and im really digging the look of the rear concave wheel. i found a few cheaper in the same style in 19s or 20 but i keep coming back to these. anybody have pics of their cts with 19's and V suspension? how do you like the ride and handling? im thinking of running 245-35-19 front and 275-30-19 rears, will these fit nicely without rubing or rolling the fenders?
I believe the lowest offset you can go is 38 before you have to worry about rubbing. Also the rear trailing arms limit how wide your rear wheels can be.
 

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Discussion Starter #3
so i should probably run a 40mm or 45mm offset all around? i saw a few V guys running 9.5" and 10" wide rims on the rear with up to 295 tires and rolled fenders. im sure a can squeeze that 9.5" wheel in the back if i get the offset right. i plan on going MM mod and eibachs after i get the wheels. i already have full V suspension. Just wanna make sure i get it right so it doesn't become a headache when i lower it
 

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'05 CTS-V
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I believe the lowest offset you can go is 38 before you have to worry about rubbing.
For what wheel width and for which end of the car? Offset by itself isn't really useful for defining fitment.

Also the rear trailing arms limit how wide your rear wheels can be.
True, but with 9.5" wide wheels and those offsets he won't run into any issues.

Its time to start purchasing some new wheels for the cts. Im very stuck on the Ground Force GF07 wheels. they are 19x8.5 for the front with 35/40/45mm offsets and 19x9.5(concave) rear with 40/45mm offsets. http://www.elementwheels.com/proddetail.asp?prod=gf71985blkgf71995blk They look a lot like the forgestar wheels i see a lot of V guys are running and im really digging the look of the rear concave wheel. i found a few cheaper in the same style in 19s or 20 but i keep coming back to these. anybody have pics of their cts with 19's and V suspension? how do you like the ride and handling? im thinking of running 245-35-19 front and 275-30-19 rears, will these fit nicely without rubing or rolling the fenders?
Up front, the stock V wheels are 18x8.5" +42 with 245/45-18s. I would probably go with the +40 offset for the wheels you're looking at, but even the +35s would fit. (The +35s would still protrude a few mm less than the 18x9" +38 Team Dynamic wheels that a number of Vs run, and you'll be running shorter 245/35-19s, so you'll have that much more clearance.) The LC fronts are 19x8.5" +42, and I run 245/40-19s on them.

In the rear, the 2 common 19"s the Vs run are the Forgestars (19x10" +42) and two different models from Linea Corse (19x10 +47). If you do the math, that's 7.35" backspacing for the LC wheels, and 7.15" BS for the Forgestars. There were some of us (myself included) who had some light rubbing on the trailing arms with the LC wheels. AFAIK none of the folks running Forgestars have had that issue, but they do have tighter fitment at the fender lip. With the narrower 9.5" wheels, either the +40 (6.82" BS) or +45 (7.02" BS) offsets should clear the trailing arms without issue. The +40 wheel would stick out about the same as the LC wheels, and the +45 would stick out a little less.
 

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Discussion Starter #5
For what wheel width and for which end of the car? Offset by itself isn't really useful for defining fitment.


True, but with 9.5" wide wheels and those offsets he won't run into any issues.


Up front, the stock V wheels are 18x8.5" +42 with 245/45-18s. I would probably go with the +40 offset for the wheels you're looking at, but even the +35s would fit. (The +35s would still protrude a few mm less than the 18x9" +38 Team Dynamic wheels that a number of Vs run, and you'll be running shorter 245/35-19s, so you'll have that much more clearance.) The LC fronts are 19x8.5" +42, and I run 245/40-19s on them.

In the rear, the 2 common 19"s the Vs run are the Forgestars (19x10" +42) and two different models from Linea Corse (19x10 +47). If you do the math, that's 7.35" backspacing for the LC wheels, and 7.15" BS for the Forgestars. There were some of us (myself included) who had some light rubbing on the trailing arms with the LC wheels. AFAIK none of the folks running Forgestars have had that issue, but they do have tighter fitment at the fender lip. With the narrower 9.5" wheels, either the +40 (6.82" BS) or +45 (7.02" BS) offsets should clear the trailing arms without issue. The +40 wheel would stick out about the same as the LC wheels, and the +45 would stick out a little less.
Great sounds like im pretty close in my estimates. 40mm/45mm offsets sound like where i need to go. AAIIIC what size tires are you running in the rear? should i stick with 275/30-19 rear or should i step up to 245/40-19 front and 275/35-19 rears? I should say this is a daily driver car that will not see anything more that some spirted driving and country road carving lol so no track day here, i have a LT1 Camaro for that.
 

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I run 275/35-19 or 285/35 on the rear, but that matches my stock diameter (245/45-18). Your stock diameter is smaller (225/55-16 or 225/50-17), so 245/35-19 and 275/30-19 are the "correct" sizes. You could run the taller sidewalls, but your speedometer and odometer would be thrown off by a few percent (couple MPH at highway speed).
 

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Discussion Starter #7
Thanks for the help AAIIIC. that pretty much squares away the decision. Are there any big brake kits for the V6? i did some searching and saw a kit from CadillacMotorsports Ltd but they don't appear to be in business any longer. I can get the V set up from the same car i got my suspension parts from but i'd rather not go to the 6 lug pattern.
 

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I have a 2004 cts and I bought some 20x8.5 and it was a bad idea. if I have people riding in the back seat and we hit a bump the back tires will rub. I now have a guy who is going to narrow my rear end.
 

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Discussion Starter #9
I have a 2004 cts and I bought some 20x8.5 and it was a bad idea. if I have people riding in the back seat and we hit a bump the back tires will rub. I now have a guy who is going to narrow my rear end.
I thought about 20's but I couldn't find the design I liked in a staggered set and correct offsets without paying an arm and a leg. Most I found had 20x10 or wider. After searching it seemed like 19s were a good compromise.
 

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Thanks for the help AAIIIC. that pretty much squares away the decision. Are there any big brake kits for the V6? i did some searching and saw a kit from CadillacMotorsports Ltd but they don't appear to be in business any longer. I can get the V set up from the same car i got my suspension parts from but i'd rather not go to the 6 lug pattern.
I think the only cost effective way to go would be using the V and/or Camaro Brembo parts. You can redrill the bolt pattern so you keep your 5-lug hubs.

KSport makes a BBK, but (1) I don't know that I trust KSport to make brakes, and (2) it costs an arm and a leg and your first-born child.

I have a 2004 cts and I bought some 20x8.5 and it was a bad idea. if I have people riding in the back seat and we hit a bump the back tires will rub. I now have a guy who is going to narrow my rear end.
What is the offset on the wheels you bought? What size tires are you running? What camber are you running in the rear? How in the world is someone going to narrow your rear end, and why would go that route rather than just buying wheels with the proper offset and/or aligning the car properly? There is absolutely no reason that 20x8.5"s won't fit right other than buying the wrong wheels/tires.
 

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2003 Cadillac cts luxury sport, with slotted rotors
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I got 19x8.5 36offset 235-35-19 tires. No issues. Rear is 19x10 40offset 275-30-19. Had to do a ton of fender rolling. And now I need a alignment. I dnt have people ride in the back. But my rear wheels dont contact the trailing arms.

Forgot to add that I have d2 coilovers Turned all the way down in front. And can go another inch in the rear
 

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Discussion Starter #12
I got 19x8.5 36offset 235-35-19 tires. No issues. Rear is 19x10 40offset 275-30-19. Had to do a ton of fender rolling. And now I need a alignment. I dnt have people ride in the back. But my rear wheels dont contact the trailing arms.

Forgot to add that I have d2 coilovers Turned all the way down in front. And can go another inch in the rear
Sounds like you are dropped pretty low. I only plan on dropping with eibachs with FE3's and MM mod. I figured id have to roll the fenders these roads in Michigan are terrible and I'm here until August. Plus when I go back to school in Illinois I will probably have riders in the back do you have any pics Jeff0101?
 

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I got 19x8.5 36offset 235-35-19 tires. No issues. Rear is 19x10 40offset 275-30-19. Had to do a ton of fender rolling. And now I need a alignment. I dnt have people ride in the back. But my rear wheels dont contact the trailing arms.

Forgot to add that I have d2 coilovers Turned all the way down in front. And can go another inch in the rear
picture please :)
 

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Discussion Starter #16

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"Angel Dust" 2004 White Diamond CTS 3.6L-V
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I'm running BMW/Borbet Style 95's, 19x9 +24 with 20mm spacers and a stretched 215/40 up front & 19x10 +24 in the rear with stretched 225/40's....I rub a bit in the rear when I have passengers and the car is pretty slammed on D2 Coilovers but, the ride is fairly smooth!
 

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I'm running BMW/Borbet Style 95's, 19x9 +24 with 20mm spacers and a stretched 215/40 up front & 19x10 +24 in the rear with stretched 225/40's....I rub a bit in the rear when I have passengers and the car is pretty slammed on D2 Coilovers but, the ride is fairly smooth!
Sounds aggressive. Got pics?
 
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