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Trying to compile a list of aftermarket setups so a range of wheel sizes & offsets, tire widths, to reduce speedo error, avoid rubbing, maximize looks/performance, etc. Hopefully, to make a quality reference thread.

Stock information:

** SOMEONE PROVIDE THIS INFO FOR THE DIFFERENT MODELS **



**
Use tire calculator to find tire size closest to original overall diameter, afterwards check if desired tire model & size are available using The Tire Rack - Your performance experts for tires and wheels or equivalent site:
http://gs.tolan-hoechst.com/tirecalc.htm

Please fill in the following aftermarket information:

Chevy Cobalt model:
Wheel Make & Model:
Wheel Size (diameter and width):
Wheel Offset Front:
Wheel Offset Rear:

Tire Make and Model:
Tire Size Front:
Tire Size Rear:

Suspension mods:
Amount of drop:

Description of wheel gap, fender flushness, rubbing, aesthetics, and other comments and problems if any (clear pictures to support description would help greatly):

** Post up pictures of your setup **

PM me with corrections if you discover errors
 

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Running these on a 2005 LS. Kosei K1 15x7 w/ 38-42mm offset(don't remember exactly) silver painted but soon to be custom Cardinal powdercoated black. They weigh in at around 14 lbs per wheel and are low pressure cast and shot peened for strength. I paid $105 a piece through tirerack when they were on closeout so I got a pretty good deal on them. My contis are bald as shit so I'm waiting until spring break so I can remove the old tires, bead blast the wheels, powdercoat them, and then mount the new tires.

Car is also riding on Eibach prokit springs with the DC bar. Handling is pretty good, still a bit of a wheel gap but I don't care. The real problem is the tires, new ones are going on soon so I can see the light at the end of the crappy tire tunnel.
 

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18x7.5 on 2006 LS Sedan
215 40 r18 rubber
45mm offset
21.2lbs
$146 each at tirerack.com

**not lowered yet


 

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Chevy Cobalt Model: 2006 Black Automatic Base Ls Coupe
Wheel Make & Model: Silver Motegi FF7's
Wheel Size (diameter and width): 18 x 7.5
Wheel Offset Front: 42mm
Wheel Offset Rear: 42mm

Tire Make and Model: BF Goodrich G-Force KDW T/A's
Tire Size Front: 215/40/18
Tire Size Rear: 215/40/18

Suspension mods: Eibach Sportline Springs, DC Strut Bar So far
Amount of drop: I Think Its Like 1.7" & 2.3"

ill post pics of my car at a later time as its in the body shop right now. no problems what so ever with fitment, rubbing etc... only downside is they are heavy rims at like 22lbs a rim. but they'll do until i can get the rims i really wanted
 

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Chevy Cobalt model: 2005 base coupe
Wheel Make & Model: Incubus Banshee
Wheel Size (diameter and width): 20x7.5
Wheel Offset Front: 40ish?(not sure lol)
Wheel Offset Rear: same^^^
$200-$220 per rim...

Tire Make and Model: General Exclaim UHP
Tire Size Front: 225/30/ZR20
Tire Size Rear: same^^^
$145(tirerack.com)-$190 each

NO RUBBING WHAT-SO-EVER!
Ride is still smooth for majority of roads...as long as its some what decent...can feel better grip/handling at high speeds then stocks...
This is the BIGGEST you can go w/o any mods...

Suspension mods: n/a (ssc soon to come)
Amount of drop: n/a







 

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Chevy Cobalt model: Cobalt LS
Wheel Make & Model: ICW Racing - Nakano
Wheel Size (diameter and width): 15x6.5
Wheel Offset Front: 35mm
Wheel Offset Rear: 35mm

Tire Make and Model:Tiger Paw Touring Trak A/S
Tire Size Front: 205/60R15
Tire Size Rear: 205/60R15

Suspension mods:None yet
Amount of drop:None yet

About $175 per rim



 

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They all look incredible.. WOW ! Those chromed G5s are astounding !!! Congrats..

I just posted a slightly minor wheel modification. I'm going from the 15" steelies on an 07 sedan ls with the hub caps bolted to them, to 16" OEM Cobalt Alloys.

2 questions for you guys
1) Did you have buy new bolts when replacing the steelies? I'm presuming longer since the steelies bolted to the hubs, and the hub caps bolted to the steelies.
2) Were you able to reuse the tire pressure sensors (swap them from one wheel to the other) or did you have to buy new ones (or just disconnect them altogether - I hope not)
3) Any recommendations on tires? Remember this is for my son 17 yo primarily to get back and forth to school, but we're in NJ so we get suprise snow, rain, and sunshine, so I need to balance good handling with good handling, wear life, and decent performance in wet or dry.. Currently looking at Goodyear T/A and Cooper CS4 to start.

Thanks and as time goes on and he saves a bit more, he'll be bitten harder by the mod bug.

Regards
Ed in NJ (the dad)
 

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Hey, I have an '09 LS with no performance/suspension mods. I was at walmart and asked to look at their low profile tires and the lady there said that putting 17's on my car would ruin the struts. Is this true? anyone out there have any problems with putting seventeens on their cobalt and it ****ing anything up? These are the rims that I want to put on it:

 

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Hey, I have an '09 LS with no performance/suspension mods. I was at walmart and asked to look at their low profile tires and the lady there said that putting 17's on my car would ruin the struts. Is this true? anyone out there have any problems with putting seventeens on their cobalt and it ****ing anything up? These are the rims that I want to put on it:

First off, Don't listen to anything anyone trys to tell you at walmart! :toung:
You will be fine with 17" rims the only thing that will change is the ride will be slightly rougher. However if you lower the car (which i recommend with any atermarket wheel setup) Then your struts will wear out fast(ER) but still not too bad.

BTW welcome to the site!
 

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did anybody get new 16inc rims and keep their stock tires?
 

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17" x 7.5" Segen Rims wrapped in 215/40/17 Capitol Sport UHP tires
 
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