Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

mini tub ?

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Old Jun 1, 2009 | 09:35 PM
  #1  
countryboy116's Avatar
countryboy116
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Default mini tub ?

hey yall thinking about doing a mini tub on my 68 so i can fit a fatter tire out back, anyone have a goood write up with pics of this done on a classic stang? also whats the widest tire i could fit stock with maybe some minor trimming if need be, im really thinkin about just mini tubbing it though so i can fit a fat tire without any worries
Old Jun 1, 2009 | 09:43 PM
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You're not going to get much from the mini-tub, aside from having to remove your rear seat. IIRC, you can only get something like an inch more room before you run into the leaf springs. If you've got a coil setup, that's a different story.

Stock, you should be able to cram a 17x9 wheel out back with 275/40ZR17's, although you may need to make some minor modifications to the fender and wheel well.

Why are you worrying about this? 8" wide wheels will fit without any problem, and you can run more tire at that width than you should need unless you have a nasty big block or stroker motor.
Old Jun 1, 2009 | 09:47 PM
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What size tire/rim are you thinking about running, that will govern what work you need to do to the car. Additionally if you are thinking about a tire that doesn't actually fit the back of the car the only reason to do it is if you are building a bit power plant...otherwise you will just slow yourself down needlessly.
Old Jun 1, 2009 | 10:27 PM
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for now im running a stock 302, once i get some other things done on the 68 illl be building a 347 stroker with tfs fast as cast heads and a custom ground billet cam, so yeah it should be a pretty hot little motor so i want the tire there so itll hoook good, i guess ill try to just get away with a 15x8 out back and maybe a 15x7 up front, anyone have pics of there classic with a 8inch wide wheel out back with a fat tire, could i squueze say around a 9 inch wide tire in there?
Old Jun 1, 2009 | 10:33 PM
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http://www.autoworksparts.com/wheel_tub_kit.htm

rear seat is retained
Old Jun 1, 2009 | 10:37 PM
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just so yall know, the rear seat will be removed anyways
Old Jun 1, 2009 | 10:56 PM
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I've got 18x9 on my 67 coupe, course my axle was from a 65 so its shorter and i still had to run with spacers to avoid the leafs. I'd say stick with the 16x7 they still look nice IMO
Old Jun 2, 2009 | 07:04 AM
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You can put a 9.5 wide wheel in the rear of a 67/8 without mini tubs on a stock height to slightly lowered car and the tire you put on it will govern if you need to roll your fender lips or not.
Old Jun 2, 2009 | 09:34 AM
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thanks i didnt think i could run a 9.5 wide tire without major mods, that should be plenty for me, a 9.5 wide tire should fit on a 8 inch wide wheel ok right? and also i think i remember seeing somewhere i should stick to around a 26-27" tall tire right? and with a 15" wheel id need around 4.5 backspacing on the rear with a 15x8 and like 4-4.25 up front with a 15x7 is this correct?
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