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Old 07-27-2013, 07:07 PM   #1
Pro Stock John
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18x9.5 40mm offset on the front

I bought a set of matching fronts for my car, 18x9.5 ZR1 replicas, 40mm offset.

Rears, just tied e brake cable back, 305/45R 18 Nitto NT05Rs:




I have Nitto 265/50/18's on the rims for the front



Did some work to fit them:

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Old 07-27-2013, 07:15 PM   #2
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Ground this down info from a sux2bu thread:



But the tire rubs strut





I think 5mm spacer might be enough just ordered it





So there you have it. I've seen one other guy run the ZR1/Z06 fronts, JacFab, I don't know what tires he had up front. But for this combo, can get the wheel to work, but the tires I have rub the strut assembly. I will try 5mm spacer, and if that's still tight I'll go 8mm and pay $70 from that place that custom makes them. I ordered some for $33 with free shipping (5mm).
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Old 07-28-2013, 10:27 AM   #3
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I'm going to put some painters tape on the strut after I try the spacer. As I'll have 2 5mm spacers, I'll try one and if it's still scuffing I'll look at doing 10mm but I think 5mm might be enough I didn't hear them rubbing.
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Old 07-28-2013, 11:11 AM   #4
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It would have been a lot easier to pull the pads out, put them in a vice and cut the weights off there. That way you wouldn't have nicked the calipers.

Did you get a weight on the wheels or tires?
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Old 07-28-2013, 02:53 PM   #5
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Yeah I'd like to powdercoat the calipers anyway, maybe this will push me.

I can go outside and weigh a wheel + tire, brb.
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Old 07-28-2013, 03:01 PM   #6
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I'm getting 57.8 Juan.
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13.15@106 1.95 | Stock
12.06@110 1.70 | Bolt-Ons
Mods: GPI Tune | Bo White PTP | Kooks Headers | Circle D 3200 | New Era OTR | RCR Ported Intake | 305/45R18 NT05R | Powerbond UDP

LSX Record List: http://motorhed.com/xf/threads/lsx-r...the-list.6022/

Last edited by Pro Stock John; 07-28-2013 at 08:34 PM.
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Old 07-28-2013, 04:41 PM   #7
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Posted in the Free Wheel Offsets thread. Those are going to look slick once you get them on there.
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Old 07-28-2013, 08:37 PM   #8
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Thanks, they are tasty:



Jason, the spacers: http://www.ebay.com/itm/231018011293...84.m1439.l2649

I don't understand the toe out adjustment you said, never done that before. To answer your question, the tire and rim are not perfectly flush I can measure if you like. But the tire is not mega wider.
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Old 07-29-2013, 11:56 AM   #9
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Ughhh John. You know your business partner happens to be very good at Camaro offsets and information, right?

Friends don't let friends hack their cars up or run spacers. I have failed you.

Tony
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Old 07-29-2013, 12:31 PM   #10
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I like how the ZR1 wheels look but running a little spacer was not my plan. We'll see how this goes.
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Old 07-29-2013, 12:57 PM   #11
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So no spacers needed for the rear then? I smell my possible rear drag setup...where did you get them?(sorry if I missed it)
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Old 07-29-2013, 01:02 PM   #12
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No spacer in back, but you have to tie back the e-brake cable or it might rub on the edge of the wheel.
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Old 07-29-2013, 01:17 PM   #13
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I got mine tied back already from a little rub.
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Old 07-29-2013, 01:31 PM   #14
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27-30 range would have been a better front offset. You'll likely need a 10mm spacer to make them not look silly and tucked too far into the car.
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Old 07-29-2013, 01:36 PM   #15
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Cool good to know. Ordered 5mm, we'll see.
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PROJECT HEAVY CHEVY: 2010 Camaro SS/RS |1SS | L99 | CGM
13.15@106 1.95 | Stock
12.06@110 1.70 | Bolt-Ons
Mods: GPI Tune | Bo White PTP | Kooks Headers | Circle D 3200 | New Era OTR | RCR Ported Intake | 305/45R18 NT05R | Powerbond UDP

LSX Record List: http://motorhed.com/xf/threads/lsx-r...the-list.6022/
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Old 07-30-2013, 08:59 AM   #16
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Posted to me in a different thread:

Quote:
Originally Posted by ihada69L78 View Post
PSJ,[ATTACH][/ATTACH]

Thought I'd let you know what I found out about using 18X9.5 Vette wheels on the front.
I'm running square 295-45-18's on Grand Sport wheels. The section width is 11 3/16. I had the same problem with no strut clearance and went with AKATA 5mm spacers. I found two issues. The AKATA spacers I got last fall are 5 7/8" diameter and the wheel mounting pad is 6". Might not be a problem but I thought I'd make you aware of it. Biggest issue is that when you use a 5mm spacer you only have 4 and 3/4 threads of the lug nut on the stud. (DOT requires 6 threads on new manufactured products.) I used Gorilla 68148 ET lug nuts to get enough threads on the stud. Again, might not be a problem????
I've got some 3mm spacers ordered in hopes I can use the factory nuts since I think they are stronger than using ET nuts. I'm sure it would not be an issue if you only go fast in a straight line. In addition to the drag strip, I go to the road course occasionally.
Hope this helps.

IHADA69l78. Gary
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13.15@106 1.95 | Stock
12.06@110 1.70 | Bolt-Ons
Mods: GPI Tune | Bo White PTP | Kooks Headers | Circle D 3200 | New Era OTR | RCR Ported Intake | 305/45R18 NT05R | Powerbond UDP

LSX Record List: http://motorhed.com/xf/threads/lsx-r...the-list.6022/
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Old 07-30-2013, 11:11 AM   #17
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PSJ

Did you measure the section width of your tires yet?
The GM part # for 7mm longer wheel studs is 11588810, but the ET lug nuts is easier. Look at them and you'll see what I mean.
My 3mm spacers are supposed to ship today so maybe i'll know if they will work with the stock lugs by this weekend. 3mm spacers should be 1/8" clearance with an 11 3/16 section width tire.
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Old 07-30-2013, 01:51 PM   #18
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10.433070866141733?

Typed in tire size here, not sure if I did it right?
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12.06@110 1.70 | Bolt-Ons
Mods: GPI Tune | Bo White PTP | Kooks Headers | Circle D 3200 | New Era OTR | RCR Ported Intake | 305/45R18 NT05R | Powerbond UDP

LSX Record List: http://motorhed.com/xf/threads/lsx-r...the-list.6022/
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Old 07-30-2013, 01:54 PM   #19
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And I'm using lugs like this, what do you think?

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12.06@110 1.70 | Bolt-Ons
Mods: GPI Tune | Bo White PTP | Kooks Headers | Circle D 3200 | New Era OTR | RCR Ported Intake | 305/45R18 NT05R | Powerbond UDP

LSX Record List: http://motorhed.com/xf/threads/lsx-r...the-list.6022/
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Old 07-30-2013, 02:25 PM   #20
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Not sure if you saw in the Free wheel offsets thread, but SUX2BU corrected me on the "toe"... It was actually the CAMBER that I changed to get the tires to clear the strut...
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Old 07-30-2013, 02:38 PM   #21
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I saw that, but I'm not sure what to do with the information.
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12.06@110 1.70 | Bolt-Ons
Mods: GPI Tune | Bo White PTP | Kooks Headers | Circle D 3200 | New Era OTR | RCR Ported Intake | 305/45R18 NT05R | Powerbond UDP

LSX Record List: http://motorhed.com/xf/threads/lsx-r...the-list.6022/
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Old 07-30-2013, 06:03 PM   #22
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Wheel width affects tire sidewall overall width. Lay your tire/wheel, inflated to proper pressure, on the floor, lay a straight edge from sidewall to sidewall, and measure from the floor to the straight edge.
Google gorilla 68148 to see what ET lug nuts are.
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Old 07-30-2013, 08:15 PM   #23
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Hey Gary, just did a quick measurement with a ruler looks like 11 & 1/4 inches, right around there. but that doesn't seem right to me as the wheel is 9.5 inches wide and the tire is not much wider... lol.

I'm going to put a long piece of painters tape on the strut before I re-mount the wheels, and then I'll drive around and see if they rub.

So you are getting those 3mm spacers from that place, they are $70 right.. 3mm might work for me too, so if they don't work out let me know. My 5mm's show up tomorrow so if I can I'll change 'em over after I get home from work.
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PROJECT HEAVY CHEVY: 2010 Camaro SS/RS |1SS | L99 | CGM
13.15@106 1.95 | Stock
12.06@110 1.70 | Bolt-Ons
Mods: GPI Tune | Bo White PTP | Kooks Headers | Circle D 3200 | New Era OTR | RCR Ported Intake | 305/45R18 NT05R | Powerbond UDP

LSX Record List: http://motorhed.com/xf/threads/lsx-r...the-list.6022/
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Old 07-30-2013, 08:24 PM   #24
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All this work because of cheap wheels that don't fit. Changing studs, grinding suspension, using spacers.... ugh.

These Camaros are heavy beasts. I'd not recommend any spacers or fewer stud threads.

The other bad thing about spacers is that most of them make you lose the hub centric feature of a wheel. This puts more shear stress on the studs.
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Old 07-30-2013, 09:53 PM   #25
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"All this work because of cheap wheels that don't fit. Changing studs, grinding suspension, using spacers.... ugh."


I'm not sure i would characterize my factory GM wheels as "cheap" but I do agree with your concerns.
I went with Grand Sport (did I mention these are factory GM wheels), not because they are cheap but because I think chrome or polished wheels look good on a white car and I was too cheap (there's that word again) to pay twice as much for the only wheels I thought looked as good as the Grand Sport wheels. I also was under the impression the GS wheels would fit without spacers, but I discovered after I bought and mounted them that they wouldn't. I didn't have any choice but to use small spacers and I did address the lug nut thread issue.
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