Cut/Roll the lip or Replace wheels/tires - Team Camaro Tech
Wheels & Tires What fits what?

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post #1 of 34 (permalink) Old Feb 5th, 17, 12:11 PM Thread Starter
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Dana
 
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Cut/Roll the lip or Replace wheels/tires

I knew these were going to be tight but I think I've screwed myself. I'm trying to run a 9.5 x 18 5.25 bs wheel with a 275/40 18 tire on my 68. The widest part of the tire is 10 7/8", there is 3/4" clearance from the tire to the wheel tub and I thought it was just going to barely clear the lip of the quarter (11 3/4" from the lip of the quarter to the inside of the wheel tub) and I could roll or trim it if I needed more clearance. Now that I've got the wheels on they overhang the quarter lip by 3/4". I'm not sure why or how that's happening or what to do to fix it, Do you guys have any ideas? Thanks for the help.
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post #2 of 34 (permalink) Old Feb 5th, 17, 12:26 PM
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Re: Cut/Roll the lip or Replace wheels/tires

I don't see how you can trim your way out of that one. Are both sides the same? Stock brakes? Did you measure the backspacing to confirm it is correct? Ideally I think it should have been 5.5" but it looks in the pic like .25 would not be enough.

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post #3 of 34 (permalink) Old Feb 5th, 17, 12:35 PM Thread Starter
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Re: Cut/Roll the lip or Replace wheels/tires

I just put a level across the tire, and from that point to the mounting surface is 5.5" so I'd say the bs of the wheel is 5.25 or damn close anyway. Even with 5.5 bs, it would drop the clearance to the wheel inner wheelhouse to 1/2 inch and I'd still be 1/2 inch too wide to clear that quarter panel lip.
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post #4 of 34 (permalink) Old Feb 5th, 17, 07:44 PM
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Re: Cut/Roll the lip or Replace wheels/tires

You could cut the opening and do a "wide body" treatment that the 1st gen racecars do or, minitub and get a narrowed rear.

Or, replace the wheels and tires. At least now you know what doesn't fit.

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post #5 of 34 (permalink) Old Feb 6th, 17, 02:35 AM
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Re: Cut/Roll the lip or Replace wheels/tires

Tire should fit.
Your rear is off-set to one side, or you have the wrong back spacing, or not a 9.5" wheel, or not a stock rear ?

275/60/15 fits perfect, I tried a 285 and had slight rubbing issue on inner wheel well.
Your "plus sized" wheel falls in the same width/height, so I point to the above.

As above...how is the other side ?

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post #6 of 34 (permalink) Old Feb 6th, 17, 12:55 PM
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Re: Cut/Roll the lip or Replace wheels/tires

I run a 275/40/18 on an 18x9 w/5.25" BS and they fit fine. Something is definitely off with yours, since on an 18x9.5 w/5.25" bs you should only be 1/4" wider than mine. What rear end is in the car? What brand of tires? As above, how does the other side look?


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post #7 of 34 (permalink) Old Feb 6th, 17, 02:11 PM
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Re: Cut/Roll the lip or Replace wheels/tires

275/35/18" here, all good.

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post #8 of 34 (permalink) Old Feb 7th, 17, 10:35 PM Thread Starter
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Re: Cut/Roll the lip or Replace wheels/tires

The tires are Nitto 555 g2, both the driver and the passenger side are the same, 3/4" overlap to that quarter panel lip. It's got a 8.5" 10 bolt rear, I'm not sure what it came out of but it has the same width as a stock rear for the 68. I'm working tonight, but tomorrow I'm going to upload pictures of how I measured and maybe you guys can tell me how I screwed this up. Thanks guys.
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post #9 of 34 (permalink) Old Feb 8th, 17, 03:11 AM
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Re: Cut/Roll the lip or Replace wheels/tires

Quote:
Originally Posted by Raiph View Post
The tires are Nitto 555 g2, both the driver and the passenger side are the same, 3/4" overlap to that quarter panel lip. It's got a 8.5" 10 bolt rear, I'm not sure what it came out of but it has the same width as a stock rear for the 68. I'm working tonight, but tomorrow I'm going to upload pictures of how I measured and maybe you guys can tell me how I screwed this up. Thanks guys.
Nitto's typically run narrower than other tires, mine are the first gen Nitto 555's, so they should be comparable to yours. Upload some pics when you get a chance. I think the rear end may be wider than stock? Or the backspacing on the wheel isn't what it says it is.


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post #10 of 34 (permalink) Old Feb 8th, 17, 05:14 AM
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Re: Cut/Roll the lip or Replace wheels/tires

Quote:
Originally Posted by Raiph View Post
The tires are Nitto 555 g2, both the driver and the passenger side are the same, 3/4" overlap to that quarter panel lip. It's got a 8.5" 10 bolt rear, I'm not sure what it came out of but it has the same width as a stock rear for the 68. I'm working tonight, but tomorrow I'm going to upload pictures of how I measured and maybe you guys can tell me how I screwed this up. Thanks guys.

I think there is something off there as well. Are you positive that you have an 8.5" 10 bolt that is the same as a stock 68? I believe the 70 and up Camaro has a slightly wider rear end. If that is the case it would explain your situation. I have the exact same tires and 18x8's in the front and 18x9 in the rear with a 5" back space and mine fit fine on a 69.

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post #11 of 34 (permalink) Old Feb 8th, 17, 07:16 AM
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Re: Cut/Roll the lip or Replace wheels/tires

X3 - I had 295/50 tires on my car and they stuck out about the same as in your pic. B/S or wheelbase has to be off.

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post #12 of 34 (permalink) Old Feb 8th, 17, 02:14 PM Thread Starter
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Re: Cut/Roll the lip or Replace wheels/tires

Included are pictures of how I've measured the backspace of the wheel to confirm it's 5.25"



Total width of the tire is just below 11"


I measured the rear end width, it's difficult with the suspension in place but I ran the tape measure through here, wheel mounting surface to wheel mounting surface and I come up with just over 60"




the wheel well opening is just shy of 12"
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post #13 of 34 (permalink) Old Feb 8th, 17, 05:49 PM
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Re: Cut/Roll the lip or Replace wheels/tires

FYI, I measured my wheel wells and came up with similar measurements.
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post #14 of 34 (permalink) Old Feb 8th, 17, 06:21 PM Thread Starter
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Re: Cut/Roll the lip or Replace wheels/tires

Thanks Arocars. At least now I know that measurement isn't way off. I guess I'll need to re order the wheels and tires but I'm not sure what the new wheel and tire sizes should be now. I definitely don't want to have another $800 screw up.
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post #15 of 34 (permalink) Old Feb 8th, 17, 07:35 PM
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Re: Cut/Roll the lip or Replace wheels/tires

You have to measure the bs with a straight edge on the wheel not the tire. Even at that the section with of 11+- on a correct BS wheel should be ok. Are you sure the wheel is 9.5 bead to bead?
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