Skinny Neb

iTrader: (2)

I keep seeing threads popping up asking what it takes to make C6 wheels fit mainly. I'll shed any info I know to hopefully at least reduce a few of these threads from showing up.

For regular C5/C5Z/C6 sizes (NOT C6Z06/ZR1), they should fit with nothing more than a 2" adapter, and some people run an 1/8" shim up front, although it's not necessary. With a 4th gen rear, no adapters are needed on the rear. This goes for all 17/18/19 versions of the wheels mentioned above.


As far as C6Z06/C6ZR1 (factory sizes/offsets, not replicas) wheels go, I have no experience with those personally, and anyone I've seen running them have swapped rear ends/minitubbed their car. I've done a small amount of research with no success, so if anyone has info on these that they would be glad to shed out, I'll be happy to change this post with your name on it.

Zach/90\irocZ

iTrader: (6)

I agree with you a lot of threads been coming up
Got info from skulte website



Using a 4th Gen Rear
If you've changed your third-gen rear to a 4th gen rear, you do not need adapters. The 4th gen rear is approximately 2" wider per side. This is the same as using a set of 2" bolt on adapters

Any corvette wheel that are 12" in width your going to need inner wheel well work , how much depends on how fat of tire you want and tuckage

Rear tire size choices
335 width tire going to need a mini tub
305-315 width tire need minor inner fender work with hammer and maybe some cutting if you like on 11" wide wheel , on a 12" wide wheel going to need alot more work depending on how tucked you want them but most than certainly needs alot off metal work not a bolt up and go deal
295 width tire on 11" wide needs very little work

Running front big brake kit ! Just fyi
Also if your running big brake kit like ls1 Or c5 you can run a
1.75 " adapter due to .3" increase in front track on each side IIRC you can still use 2" adapter
For brembo setup with 1le hub it pushes front track .6"
So you can run a 1.5" adapter

Slash

Would .25 make a big difference for upfront? I listened to everyone saying 2" adapters for the c5 z06 rims which even the OP states.. but that thing from skults says 2.25 lol

Orr89RocZ

iTrader: (20)

I run 1.75" front adapters on 18x8.5 c6 wheels, along with c5 brakes. 2" could work fine to. I ran 1.75's before c5 brakes as well and still fit fine

The rear 19x10's in 79 mm offset would require a 2.5" spacer! I run 4th gen rear and still need a .625" hubcentric slip on spacer. 2.5-2.625" would be ideal for thirdgens!

Zach/90\irocZ

iTrader: (6)

Skulte doesn't account for brake upgrades offset changes .3-.6" upfront depending on brake setup and is based on stock thirdgen specs brakes and rear end
It depends on how much tuckage you want but it does make a slight difference

Good info , iirc there where slight variation in 4th gen rear width and that 99 or 00 and up 4th gen rear where either slightly wider or narrower , it was couple years back but could be a myth lol

Orr89RocZ

iTrader: (20)

I ran 295/30 and now a big 305/35 tire. It tucks but required alot of inside well work to keep from rubbing. 275-285 may clear better

Zach/90\irocZ

iTrader: (6)

Yea I run 295 on 11 not a corvette wheel but needed light work I may try 305 when I get a chance

HybridZ

Ok guys I read all these posts and just want to make sure. These are the wheels I'm looking at off ebay. Will these fit my 3rd gen Z28 with the right spacers? I don't want the wheels sticking out or rubbing either. My Z is also lowered on Hotchkis springs. Offsets are 56mm front / 79mm rears. Here's the description. Any help would be great. Thanks in advance.

These are the Centennial cup wheels :

This listing comes with (2) - 18x8.5 and (2) - 19x10.0 for a total of 4 wheels
WILL NOT FIT 2005-2013 , Z06, ZR1 OR GRAND SPORT
C6 SIZES AVAILABLE IN SATIN BLACK, GLOSS BLACK, AND CHROME ALSO!! PLEASE SEE OTHER LISTINGS.

OFFSETS 56/79MM

Zach/90\irocZ

iTrader: (6)

Really ,did you read the post above

HybridZ

Yeah I did read it but I'm not a very technical guy so therefore I am asking for confirmation just to make sure. That's all. Then with all the other posts and numbers I'm starting to get confused. Don't need the sarcasm. If I knew 100% I wouldn't have to ask so please excuse me for not fully understanding.

Zach/90\irocZ

iTrader: (6)

Just follow specs down line , don't let the wheel diameter throw you off
Back spacing and or wheel offset are what important any corvette wheel on stock thirdgen is a standard 2" as you can see on far right column

19x10 rear - 79mm - 2.25" Rear

18x8.5 front. - 56mm - 2" front

Like stated above 4th gen rear is 2" wider on each side
And big brake upgrade up front

Also like stated above you can gain more clearance from inner wheel well in the rear if you want more tuckage

HybridZ

Cool, thanks for clarifying for me. Appreciate it.

AssaulT/A

So the idea is, correct me if I'm wrong, you take the backspacing of the corvette wheel, subtract the offset, and then subtract the size of the spacer you are using. This should get you no more than 5" in the front, and 5.6" (IIRC) in the back, which are the maximum backspacings possible on a stock thirdgen.

JRODRS

Thanks really helped. I had some 12" in mind but now thinking of going a different route.
But what if I swap to a 4th gen rear end same thing still needs inner fender work?

Zach/90\irocZ

iTrader: (6)

Doesn't matter still need inner wheel well work
like stated above aanything wider than 11" wheel and anything larger than a 295 tire

All that changes is that you dont need adapters in the reae

Orr89RocZ

iTrader: (20)

I'd still go more like 2.5" on the rear spacer for the 79mm offset 19x10 wheels. Especially if you want 295-305 tire

Skinny Neb

iTrader: (2)

This makes me wonder what the offset is on the factory 18x10 C6 wheels are (NON z06)? Unless I'm just that plain stupid, I didn't see it listed on the chart, but I'd imagine it would be the same as the 19x10s. If that is the case, anything more than the 2" spacers that I currently use would stick the tire clear out of the fender. It meets up perfect right now, and I have plenty of room left on the inside fender well for a 295 if money would allow.

Orr89RocZ

iTrader: (20)

Its not. The 18's are not the same as 19's. the 19's for some reason have a high offset at 79mm. Most 18 x 9.5-10.5 vette wheels are 54-56 mm. Thats about an inch different.
2.5 will tuck the 19. If you could get a 2.625" that may be even better. Regular 2" spacers work fine for 9.5 and 10.5" 17-18 wheels.

I have the 4th gen rear and a .625" spacer to get my c6 19x10 wheels off the inner well and just inside the lip. Perfect fit and 4th gens are 1.875-2" wider depending how you measure

Zach/90\irocZ

iTrader: (6)

From my understanding is that non z06 had higher offset due to fact of not having wide body compared to zo6 for more tuckage with tire which retracts wheel 20 mm I believe as zo6 doesn't have same issue due to wider fenders which are about tad over 1.60" wider on each side I believe hence why c6 zo6 wheels have lower offset and is also wider I think 12" wide wheel here is straight comparison of wheel specs

C6 non Z06
Front 18 x 8.5, +56 mm offset
Rear 19 x 10, +79 mm offset

C6 Z06
front: 18 inch x 9.5 inch, +40 offset
rear: 19 inch x 12 inch, +59 offset

Zach/90\irocZ

iTrader: (6)

More detailed wheel specs to include C7

17" × 8.5" +56 88-96 frt/rear97-04 frt
17" × 9.5" +54 88-96 frt/rear, 97-04 frt
17" × 11" +36 90-95 ZR1 rear
17" × 11" +50 96 Grand Sport rear
18" × 8.5" +56 88-96 frt/rear, 97-13 frt exc. C6 Z06, ZR1, Grand Sport
18" × 9.5" +40 84-87 frt/rear, 06-13 Z06 & Grand Sport frt
18" × 9.5" +57 97-04 rear, 05-13 frt
18" × 10.5" +58 97-04 rear
19" × 10" +40 06-13 C6 Z06, ZR1 & Grand Sport frt, 427 Convertible frt
19" × 10" +56 97-04 rear
19" × 10" +79 05-12 rear
19" × 11" +64 97-04 rear
19" × 11" +79 05-13 rear
19" × 12" +59 06-13 C6 Z06 & Grand Sport
20" × 12" +59 06-13 C6 Z06, ZR1 & Grand Sport rear, 427 Convertible rear

2014 C7 Stingray
Front: 18" x 8.5" with 245/40/18
Rear: 19" x 10" with 285/35/19

Offset are same as standard C6

2014 C7 Coupe with Z51 Performance Package
Front: 19" x 8.5" with 245/35/19
Rear: 20" x 10" with 285/30/20

Same offsets as standard C6

If any info is off let me know

Skinny Neb

iTrader: (2)

Thanks for posting that info up, took care of my confusion.

Zach/90\irocZ

iTrader: (6)

No worry

Zach/90\irocZ

iTrader: (6)

A Historic Look Back at the Wheels that Vettes Ride On!

1953-1967
http://www.corvettereport.com/corvet...967/#more-2936

1968-1996
http://www.corvettereport.com/corvet...-1968-to-1996/

1997-2009
http://www.corvettereport.com/corvet...009/#more-3287

Old links I saved awhile ago thought I share pretty cool

jaybdaboat

Would those tires go on with no problems for the c7 and z51 package or would it mess up the speedometer? Just asking.

Skinny Neb

iTrader: (2)

All that matters is overall tire height. It should only change your speedometer readout if you change tire height from stock. You may have to get your speedometer calibrated if you change tire heights, but it won't change your speedometer near as much as a set of gears would, so it isn't worth the time to mess with IMO.





In all honesty, I don't really worry about it. One because our speedometers don't read high enough anyway, two because mine has 3:70 gears, and three because my speedometer cable broke.

Zach/90\irocZ

iTrader: (6)

Yea I agree

I don't really mess with the speedo I try to stay as close to stock tire height as possible but if your taller no harm no foul I drive with flow of traffic or faster so it doesn't matter to me lol very minimal complaint vs the looks and performance gains from wider tires, especially running atleast 9.5 upfront makes a big difference

In short your speedo will read higher or lower depending on tire height and in no way or fashion will it damage anything , unless your running low rider wheels than your trans will get mess up lol

And honestly I think thirdgens look better with a taller tire anyways it fills the wheel well alot better

DiabolicalRS

before i make another thread, just want to get yalls opinion on these before i buy em..

Zach/90\irocZ

iTrader: (6)

I wouldn't be surprised if majority of those adapters came from one source and sold at different price points

You can go wrong with the ones you posted

I prefer wheel and hub centric the one you posted is just hub centric

I've had ebay adapters they did the job and will do so for majority of people but there imported from China and aluminum is probably a lower quality and no warranty of some sort and fitment was ok but not perfect over all just wasn't happen and didn't feel confident about them

Me persinally i went after much research spent alittle more and got adapters from motorsport tech I personally prefer them and fitment was 100 times better also and less vibration , aluminum was definitely higher quality I believe 6061t6 billet aluminum and there cut using cnc machines also lifetime warranty a bit more more but saftey is very high in my list

But that's my opinion so others will think other wise and dont think it's worth it, so it's up to I'm sure you be happy with whatever decision you make

DiabolicalRS

do you have links or part number from the place you got yours, still looking for the right set.

Zach/90\irocZ

iTrader: (6)

https://www.motorsport-tech.com/wheel_adapters.html

Call them they often have returns at discount prices

DiabolicalRS

perfect thanks zach

slowsi

iTrader: (2)

how do the cars look with large spacers?

paul_huryk

Zach,

I noticed a few errors in your list at the top of the thread.

1) 84 to 87 coupes came with 8.5" wheels standard, convertibles had 9.5" for whatever weird reason. Could be wrong, but this is what I have seen and heard.

2) If the early C4 16" x 9.5" wheel really has a 6.6" BS, you would need a 1.5" spacer to fit, otherwise it would stick out 0.5" past the wheel well.

Zach/90\irocZ

iTrader: (6)

1) My understanding and what I seen it that It was dependent on year as they weren't consistent on what wheels came on what suspension package and their fact that all were mounted on 255/50 tires , but what I gathered is that it is dependent on suspension package the corvette received from factory 84-87 are wacky when it come to wheel sizes also seen were early z51 packages had 8.5 front and 9.5 rear , but most z51 should have gotten 9.5 from factory and that it wasn't dependent on coupe vs convertable

2) 8.5 had + 32 offset and 9.5 had +38, but I also heard offset range from 36 - 38 mm

All in all seems to be wacky lol

http://www.corvetteactioncenter.com/...usp_chart.html

You would need 1.5 spacer

Blue 90 RS

I am running 2.25" adapters on the front of my 1990 RS w/factory brakes. I bought that size based on the info from the Skulte website. If I would have bought 2.00" adapters, my wheels would have rubbed the tie rod ends. I'm running 17x9.5" Replica C4 ZR1 wheels (from OE Wheels LLC), +56mm offset/7.45" backspacing and 275/40R17 tires.

I am upgrading to C5 Z06 brakes on the front this weekend (from Scott at www.bigbrakeupgrade.com). They're actually on the FedEx truck to be delivered today! Excited! Anyways, I also have a new set of 2.00" adapters to use in place of the 2.25" ones because of the added track width the brake upgrade adds.

YMMV, however, with my current factory brakes, the distance between my wheels and the tie rod ends is barely 1/4", so I'm glad I bought what I did. This problem likely would not exist with 18"/19"/20" wheels, because the larger radius causes the rim to be further from the tie rod (and other components).

Hope this helps....

Skinny Neb

iTrader: (2)

Being perfectly honest, I myself run a 2" spacer with a .25" shim, not for clearance, but to bring the tire out to the edge of the fender.

Skinny Neb

iTrader: (2)

Uhh... that ain't a Camaro... But it sure looks good!

And by the way to anyone who wants to click the link, it's NSFW!



Edit: Fredj87 seems to be a spam bot. All of his posts contain that same link.