Official Wheel and Tire Fitment Thread

[The Champ]

Thanks for the help. I asked the guy at TireRack too.

So the conclusion is, 17 x 7.5 wheels with 225/45/17 tires on them. The wheels have a 38mm offset.

I plan to get summer tires for maximum traction. I hope this really helps acceleration and stopping compared to the stock tires on the RS.

Personally, I would go with 235/45/17's. Stock tires are 25.1" tall - the 225/45's are 24.9 and the 235/45's are 25.3. All real close.

The 235/45's will put a lot more rubber on the road though.

There are others on the board running 235/45's without any clearance problems.

I have 16's on my car and run 225/50/16's in summer and then run winter tires in the stock 205/55/16 size.

I'm in MN also - SW of Rochester.

 

[nickalltogether]

Whoring out my new wheels some more

Setup as pictured

Wheels- Miro 398 18x8.5 ET35 redrilled from 5x100 to 5x105
Tires- Hercules Ironman iMove Gen 2 225/40/18
Suspension- Eibach springs on stock RS shocks/struts
Thoughts- Fitment is pretty much flush. The tires have an ever so slight stretch and the wheel is more or less even with the fender line. Could possibly come out a few more millimeters, but it's perfect for a DD in my opinion. The car looks in need of more lowering now, so I'll try to update my thoughts if and when that happens.

Cool lens flare shot:

Back view to try to illustrate fitment:

A picture I thought looked neat:

 

[MikeBurns92]

Maybe someone with wheel smarts could help me. Im not very educated in wheel fitment and sizes. I was looking to run a set of these rims, but i know im going to need adapters or to have them redrilled. I heard it was easier for adapters though. Either way i want to get these for the winter season to put snow tires on. I have no idea with adapters how big a tire and wheel i can run. I dont need any "hellaflush" or lower wheel gap or anything, just be able to run the wheels i want with snowtires. Cragar | Series 342 D Window Wheel Information

 

[The Champ]

There is no way to get those wheels to work on your car. The OE 15x6" rims have 39mm offset and these rims don't even come close (0 - 6mm offset in a 15x7).

What does this mean:

Offset is the measurement of where the mounting surface is located within the wheel.

On a 15x6 with 39mm offset, that means that the mounting surface is set back about 5" (38mm) from in inside rim edge (this is called backspace). On a 7" wide rim 39mm would be about 5.5".

The closest you can get in those wheels you want is a 15x7 with 6mm of offset, which would only equal about 4.25" of backspace.

What does this mean - your wheels will stick out 1.5" farther than the stock rims. Adapters will only make this worse.

So when you're looking at rims, you need to look at rims that have an offset of close to 39mm.

Hope this helps.

 

[MikeBurns92]

There is no way to get those wheels to work on your car. The OE 15x6" rims have 39mm offset and these rims don't even come close (0 - 6mm offset in a 15x7).

What does this mean:

Offset is the measurement of where the mounting surface is located within the wheel.

On a 15x6 with 39mm offset, that means that the mounting surface is set back about 5" (38mm) from in inside rim edge (this is called backspace). On a 7" wide rim 39mm would be about 5.5".

The closest you can get in those wheels you want is a 15x7 with 6mm of offset, which would only equal about 4.25" of backspace.

What does this mean - your wheels will stick out 1.5" farther than the stock rims. Adapters will only make this worse.

So when you're looking at rims, you need to look at rims that have an offset of close to 39mm.

Hope this helps.

Holy crap. Im surprised i got a response. Your answer does help alot actually. While proving that i am unable to get the rims i want, you have taught me something. Im sure i will be coming back for more knowledge at least ill know where to look. I realized, i have the 17 inch rs wheels. It appears they have 41.5mm offset. Im still trying to comprehend the chart with the knowledge you have given me. Do you have to convert from inches to millimeters? is that the difference between numbers? Also on the website i listed, what is the difference between offset and rear spacing? or are they the same thing as you describe?

 

[bluejay]

fast wheels - kimura -f201 machine black

i have been looking at these rims from fast wheels . kimura
size-17''x7.5''
bolt pattern-5x105
offset=25
lip 3.5''
seat 60 deg.
centerbore-72.6

i dont see anything wrong with the sizes except for the offset . but i think the 25 would only make the wheels flush with my fenders . when i try to see if these wheels are compatible with my 2016 stock rs the web site tells me that they wont fit my car. does anybody have any idea why ? i had kinda assumed that any rim i find with a 5x105 bolt pattern will fit a sonic or cruze with no issues. rim masters any input will be greatly appreciated .

 

[nickalltogether]

They would be about flush with the fender.

 

[cuartz7o]

Looking to know if there would be any inside rub by upgrading form RS 17" to Cruze 18" Wheels w/ 5mm spacers, et42 (see image 2 below). Also, this would be slightly less than flush correct?


Stock 17" RS Wheels / then with 20mm spacers ONLY

Stock 17" RS Wheels / then with 18x7.5 et42 + 5mm spacers (DDMWorks)

thanks so much!

and the rim FYI:

 

[timjgallagher11]

So they do fit speaking from experience. They will however rub when you turn the wheel all the way.

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[RS Smash]

Question on fitment. I have an RS with the 10mm GM lowering kit. I am looking at putting on a 235/40r18 on a 18x8 et 35 rim. I do have 5mm spacers if needed. Should it fit?

Thanks, Jim

 

[cuartz7o]

So they do fit speaking from experience. They will however rub when you turn the wheel all the way.

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very Nice! what size are those tires and have any more pics. I'm debating if I should keep the stock 17" RS wheels. not too many RS models I'm seeing in and around San Francisco.

 

[mcanderson0]

Took me a little bit to find a wheel that i like in the bolt pattern that we have been dealt. JNC Wheels is a good outfit, they have a lot of wheels in 5x100 that they said they can slot to 5x105. They can also redrill, but I would prefer NOT to have the 10 holes showing on the bolt pattern. The guy on the phone was very helpful. I think I found JNC via this thread a few months ago.

Im looking at these in a 17x8 ET32, but in the black chrome finish, which isnt shown here (that's matte black on the right):


I have a redonk sound system (build log forthcoming, 4 15's walled on 6kW) so I dont have room for a spare. I'm looking at 225/45 in a run flat.

Any comments or anything I should be concerned about? The car sits a bit low in the back, so I may need to get some custom rear coils made.

 

[nickalltogether]

Took me a little bit to find a wheel that i like in the bolt pattern that we have been dealt. JNC Wheels is a good outfit, they have a lot of wheels in 5x100 that they said they can slot to 5x105. They can also redrill, but I would prefer NOT to have the 10 holes showing on the bolt pattern. The guy on the phone was very helpful. I think I found JNC via this thread a few months ago.

Im looking at these in a 17x8 ET32, but in the black chrome finish, which isnt shown here (that's matte black on the right):

I have a redonk sound system (build log forthcoming, 4 15's walled on 6kW) so I dont have room for a spare. I'm looking at 225/45 in a run flat.

Any comments or anything I should be concerned about? The car sits a bit low in the back, so I may need to get some custom rear coils made.

8" width with a +32 and a 225 tire shouldn't have any problems. I'm 8.5" with a +35 and don't have any issues. I also have a 225 width tire. Unless you have the car down so far it's fully tucking tire I don't see anything rubbing.

 

[c.geanis]

Hey guys skimmed through the thread and I can't find anything about these specs.
205/50R 17 with 17x9 et25.
I'm trying to switch to that setup would it work as far as rubbing room?

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[carsNskis]

Fun visualizer that works on mobile

http://www.discountedwheelwarehouse...3&wheel=4813&wheelimage=21874&showallwheels=1

 

[nickalltogether]

Hey guys skimmed through the thread and I can't find anything about these specs.
205/50R 17 with 17x9 et25.
I'm trying to switch to that setup would it work as far as rubbing room?

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Shouldn't contact on the inside, but will have a healthy amount of poke for sure.

 

[texan]

Can someone just give me peace of mind that these fit before I buy them? Amazon seems to think no but it's 17x7/5x105 with 40mm offset

https://www.amazon.com/Motegi-Mr116...d=1483608481&sr=1-25&keywords=Motegi+Mr116+17

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[nickalltogether]

They should fit.

 

[MattintheHat]

I'm looking at wheels that are 17x8 ET+35, I've done the math and looked at several different sites. And I'm pretty sure they will be pretty close to flush without a spacer. Am I correct?

 

[MyLonewolf25]

Just because it's literally 20+ pages has anyone figured out what's the widest rim you could run without a spacer and what's the widest you can run with an adapter/spacer ( so probably a 1 inch spacer ) ?


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