18x9.5 on a 66? - Vintage Mustang Forums

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post #1 of 20 (permalink) Old 03-16-2017, 08:37 AM Thread Starter
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18x9.5 on a 66?

I am thinking about doing a pro touring look to my coupe with 18x8 in the front and 18x9.5 in the rear. I will roll the fenders but want to really keep the rest of the body stock, any thoughts or ideas? Does anyone have pics with 18x9.5's on the rear?
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post #2 of 20 (permalink) Old 03-16-2017, 10:03 AM
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How much of a drop are you planning? Doing a drop spring/spindle plus the Shelby drop will put it in the fender. Depends on your sidewall. I have a 215/45-17 and with the slight negative camber it has , it's just tucked in. If you do 18's, you'd have to leave the suspension a bit higher and use like a 30 sidewall. It would probably still rub like crazy on full turns and you'd have to modify the front bottom lip of the wheel well to allow turning
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post #3 of 20 (permalink) Old 03-16-2017, 10:15 AM
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The only way to really know for sure if it will fit on your car is to rent the Wheel Fit tool from these guys
Wheel Fit RENTAL (Ultimate Kit) - $49.99 : 1320 Wheels

Go to your local used tire store and get an 18" tire with the width & sidewall you want to use. Then mount that to the wheel fit tool and try to get it to fit by adjusting the backspace on the tool. If you bought two tires and rented the tool, you're probably spending around $125 total (including return shipping for the tool), but that's a lot cheaper than buying wheels that won't work.

On my 65, I could only get a 17x7 wheel to fit (because of the backspacing available for the wheels I wanted). If you're going to get custom wheels made, then you can get an 18" wheel to fit..but not really sure you can get a 9.5" wheel to fit in the back regardless of backspacing. This post has a wheel/tire chart for 65-66 cars...but not info on a 9.5" rear wheel.
Is there a wheel and tire chart for a 65 Mustang.

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post #4 of 20 (permalink) Old 03-16-2017, 08:56 PM
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You're not going to fit 9.5's in the rear unless you tub it or pump/flare the guards
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post #5 of 20 (permalink) Old 03-17-2017, 05:54 AM
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Check out Shaun's (Street or Track) black coupe. 18 x 8.5 front running 255-35-18, 18 x 9.5 rear running 275-35-18 without mini tubs


Next phase for the 66 coupe

I have never "made" anything, I just modify the things around me into useful items with abilities that were GIVEN to me.

Mike
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post #6 of 20 (permalink) Old 03-17-2017, 06:22 AM
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He mentions he mini tubbed it in the first post bro, and you can see it in the pics
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post #7 of 20 (permalink) Old 03-17-2017, 09:36 AM
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Quote:
Originally Posted by hus65 View Post
He mentions he mini tubbed it in the first post bro, and you can see it in the pics


Oops, my bad.

I have never "made" anything, I just modify the things around me into useful items with abilities that were GIVEN to me.

Mike
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post #8 of 20 (permalink) Old 03-17-2017, 12:09 PM
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Flares or tubs are the only options, keeping rear leafs or not will also influence things. I plan on a 9.5 or 10" rear on my car with a 275/18 and I will have about 1 3/8" flares with rear leafs and a Maier Panhard. I think it will end up a 9.5" with custom BS rims with a 9" in the front at about 255. You also have to plan on some level of deflection in the tire while cornering in the overall space available, I have heard 3/8 to 1/2" for deflection in a lower profile tire.

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post #9 of 20 (permalink) Old 03-17-2017, 02:41 PM
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I fit an 8.5" with a 255 in the back but I had to trim the inner fender lip, pull and roll the outer lips. Best to do these mods while you're in primer haha.
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post #10 of 20 (permalink) Old 03-17-2017, 10:10 PM
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18x9 on the back of my 65:









Minitubbed, rolled lips, narrowed leafs, 275 r compound nittos
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post #11 of 20 (permalink) Old 03-18-2017, 07:50 AM
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65/66 cars on the rear a 8" wide rim and a 245mm wide tire using a minimum 4.75" to a max of 5" of backspace is a nice fit.
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post #12 of 20 (permalink) Old 03-18-2017, 07:54 AM
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I love the white lettering! How did you do it?

'66 Coupe - Pro-touring in the making

289 4bbl
T-5Z
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And no more money left in my wallet...
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post #13 of 20 (permalink) Old 03-18-2017, 08:55 PM
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I just happen to have pictures. It's also documented in my build thread:













The stencils I bought off eBay. With my custom centercaps turned on the lathe:





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post #14 of 20 (permalink) Old 03-20-2017, 12:34 PM
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You can run 18X9.5 in the rear with a 275/35/18. You do not need to run 30 series tires. You do not need to have a rally car suspension for clearance. I have had my 18's for over 3 years now.No tire to body contact anywhere.
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post #15 of 20 (permalink) Old 03-20-2017, 01:24 PM
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Your fastback is sweet.
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