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04-27-2014, 06:14 PM #1
- Join Date
- Apr 2014
- Location
- Kansas
- Posts
- 8
Red- 1998 Z28 Camaro
F-Body with 18/19 C6 wheels - Help with tire size
Hey guys! This is my first post on this forum.
I have done lots of research online, and can't quite find a definitive answer to my question. I just bought a set of C6 wheels and I'm struggling to decided on a tire size.
Originally I planned on running the stock Vette size, but then I found out that there could be some ABS issues running tires with over a 1" variance in overall tire diameter. The corvette tire sizing has a 1.13" difference between the front and rear tire diameter. My questing is, what is the exact limit that will throw the ABS off, and cause issues?
If I run 255/35/18 up front and 295/30/19's in the rear, that would be a .94" difference in diameter. Would this be OK? I like this size combo because the sidewalls are close to the same height.
I also bought a set of 1.25" wheel adapters for the rear wheels on ebay, so I've got that covered.
I've seen a lot of posts on C6 wheels, but most of the information is old and incomplete. So any help on the topic would be great!
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04-28-2014, 04:22 AM #2
- Join Date
- Oct 2007
- Location
- Muncie, IN
- Posts
- 2,554
00 TA PWTR, 98 VertTA NBM- 80 TA BLK, 80 Formula NBM
I run the stock vette sizing, 245/40/18 up front and 285/35/19 in the rear, with no problems. In the rear, they are very close to the inner fender well/shock mount using the 1.25" adapters, but fit nicely.
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04-28-2014, 06:21 AM #3
- Join Date
- Apr 2014
- Location
- Kansas
- Posts
- 8
Red- 1998 Z28 Camaro
Thanks for the reply!
What brand tires are you running?
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04-28-2014, 11:42 AM #4
- Join Date
- Oct 2007
- Location
- Muncie, IN
- Posts
- 2,554
00 TA PWTR, 98 VertTA NBM- 80 TA BLK, 80 Formula NBM
Falken ziex in the front, goodyear eagle f1 in the rear. The good thing about using the f1's is there's a lot of nice used ones floating around since they were the oem.
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04-28-2014, 11:51 AM #5
- Join Date
- Apr 2014
- Location
- Kansas
- Posts
- 8
Red- 1998 Z28 Camaro
I think I'm going for the BFG KDW2's or the Michelin pilot super sports.
You are the second person now that has told me they run the stock vette size with no problems, so I think that's what I'm going with. But it never hurts to get more peoples opinions!
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04-28-2014, 12:00 PM #6
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04-28-2014, 12:39 PM #7
- Join Date
- Apr 2014
- Location
- Kansas
- Posts
- 8
Red- 1998 Z28 Camaro
I don't want to roll the fenders. For me, that's not an option.
I'm almost starting to think I should try and find 2 more 18x8.5 wheels and run 18's. Damn it.
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04-28-2014, 12:56 PM #8
- Join Date
- Oct 2007
- Location
- Muncie, IN
- Posts
- 2,554
00 TA PWTR, 98 VertTA NBM- 80 TA BLK, 80 Formula NBM
Well that's my point. You stick with the stock corvette size and 1.25" spaces, you will not have to roll the fenders wells.
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04-28-2014, 02:30 PM #9
- Join Date
- Apr 2014
- Location
- Kansas
- Posts
- 8
Red- 1998 Z28 Camaro
Thanks, man. I appreciate your help!
I just tried to call my local tire store (that is supposed to be the best in town) to get tire prices, and got an earful of babble about how dangerous wheel adapters are. He pretty much said I was going to die.
So I guess I will just order tires from tirerack.com
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04-28-2014, 07:11 PM #10
- Join Date
- Jan 2009
- Location
- North Jersey
- Posts
- 11,496
Phantom Black Metallic- 2004 GTO M6
Just an FYI: I had a customer come in with a third gen Firebird convertible to have C6 ZR1 replicas installed...with spacers...no issues. I have NEVER heard someone advise against spacers. Ever.
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04-29-2014, 05:00 AM #11
- Join Date
- Oct 2007
- Location
- Muncie, IN
- Posts
- 2,554
00 TA PWTR, 98 VertTA NBM- 80 TA BLK, 80 Formula NBM
2000 TA, A4, LS6 intake, Magnaflow, WS9 hood, BMR STB, UMI boxed SFC, Spohn LCA, 9" Ford
1998 TA Vert, NBM, M6, Flowmaster, WS6 hood, WS6 airbox, C6 wheels, UMI SFC, BMR STB
1998 Bird, Black, V6, A4, 18" 077's, Wings West Body Kit
1980 Formula, NBM, 402BB, cam, DR timing, LT headers, 3" TD w/ flowmasters, TH350
1980 TA, Black, 301, bone stock
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04-29-2014, 06:04 AM #12
- Join Date
- Apr 2014
- Location
- Kansas
- Posts
- 8
Red- 1998 Z28 Camaro
I agree. This is a street car that might see the strip 1 or 2 times ever. I will do h/c/i this fall, and my overall goal is to have 450rwhp. So I think this setup will be perfectly safe for me.
I think I have decided on Michelin super sport pilot's. I'm going with the stock size tire in the back, and moving up to a 255 in the front. This will take the rev difference from 33 down to 23. Just for a little added help against potential ABS issues.
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04-29-2014, 10:33 AM #13
- Join Date
- Oct 2007
- Location
- Muncie, IN
- Posts
- 2,554
00 TA PWTR, 98 VertTA NBM- 80 TA BLK, 80 Formula NBM
You should be more than happy with that setup. Post some pics when you get em on!!!
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05-01-2014, 06:45 PM #14
- Join Date
- Apr 2014
- Location
- Kansas
- Posts
- 8
Red- 1998 Z28 Camaro
I mounted up a rear wheel tonight with the 1.25 in adapters.
Firstly, the I bought wheel and hub-centric adapters. They fit the hub a little looser than I would have thought, but when you tighten the lugs it seems to center the adapter nicely. The fitment from the adapter to the wheel is TIGHT. I had to lightly sand any polish the adapters to even force them on... I don't know if I like how tight they fit...
The wheel is damn close to the inner fender! How close is too close? I might have 1/2" of clearance from the wheel to the inner fender... I don't want to order tires until I know everything will fit without rubbing...
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05-02-2014, 12:02 PM #15
- Join Date
- Oct 2007
- Location
- Muncie, IN
- Posts
- 2,554
00 TA PWTR, 98 VertTA NBM- 80 TA BLK, 80 Formula NBM
Sounds all familiar to me.
I have to kick my wheel a few times to get it off the adapter.
As for the clearance on the inner fender, I think mine ends up being closer to 1/4" after the tire is mounted. This is very close but I have never had any issues with it.
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06-25-2014, 12:56 PM #16
- Join Date
- Apr 2014
- Location
- Hayward/Castro Valley
- Posts
- 11
Black- 1998 Pontiac Transam WS6
Don't mean to revive/hijack an old thread, but I just bought some C6 rims for my ws6 and adapters (coming in Friday). Did you need to trim the rear wheel studs at all? or are 1.25" adapters wide enough to ensure everything fits flush?
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06-25-2014, 02:25 PM #17
- Join Date
- Apr 2014
- Location
- Kansas
- Posts
- 8
Red- 1998 Z28 Camaro
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07-22-2014, 08:18 AM #18
- Join Date
- Jun 2014
- Location
- NC
- Posts
- 10
red- 98 Trans Am
sounds like 1.25" spacer in the rear is the way to go, how about up front? I want to get the fronts a little more flush. Any recommendations for front spacers? I also want to lower it, have any of you also lowered the car with these wheels?? Thanks for any help.
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07-23-2014, 05:41 PM #19
- Join Date
- Jan 2009
- Location
- North Jersey
- Posts
- 11,496
Phantom Black Metallic- 2004 GTO M6
1.5" spacer should suffice.
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07-24-2014, 08:36 AM #20
- Join Date
- Apr 2010
- Location
- Alabama
- Posts
- 3,625
Black/ Silver- 98 TA WS6/ 01 C5 Corvette
You will need longer studs with a spacer that size or use an adapter that has its own studs. I have 30mm (about 1.18") adapters that I don't need if anyone needs them. They are essentially brand new.
1998 Trans Am WS6 - Phantom
421 CI LQ9, Tick Performance Custom Cam, TFS 255cc LS3 heads, Kooks 2" LT headers, Kooks 3" True Duals w/ high flow cats, FTP 104 lid, Speed Density Tune, 4" silicon tube, LS6 VCT, FAST 102 Intake, NW 102 TB, Oil Catch Can, SLP Bilstein Shocks w/ Vogtland Springs, CTS-V 4-piston Calipers w/C6 Z06 rotors, Stainless Steel Brake Lines, R1 concepts premium rotors, Hawk HP+ brake pads, VFN WSQ Hood, C5-R timing chain, SLP oil pump, E85 tune, Walbro 450 fuel pump, Deatschwerkz 95# injectors, Breathless performance headlights, Frost Tune, !HVAC.
(Coming Soon) BMR DSL, UMI TQ Arm
421 LQ9 14.8:1 on E85 Build/
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