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Old 03-16-2006, 02:55 AM   #1
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Mini-tubbing a 68 Fastback...

OK i want to run some wide tires, maybe some 335s. i am curious if i mini-tube my Fastback will i still be able to use all the stock interior equipment? can i still put teh seat down and all that? I don't wanna have to modify the interior parts to make them work.
If anyone has done a mini-tub can you post some pics so i can see what you did.
Thanks

Dana
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Old 03-23-2006, 05:43 PM   #2
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I minitubbed my 68 coupe. All I did was cut the flange off the rear from and move the inner wheel well all the way over flush to the frame. Gives about 2 inches more clearance in the rear of the wheel well and like 4-5 inches at the front of the wheel well. I still have leaf springs and dont think I could get a 335 in there. I'm running a 28X10.5 inch slcik on a 15X8 inch wheel with 5.5 inch B.S. If you switched to a coil over or relocated the leafies, then you'd have a better shot at that big of tire.
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Old 03-24-2006, 11:18 PM   #3
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About the biggest tire you can run is a 315. that's about it. And there is a little more room, but too much trial and fit, who knows if you could fit a bigger one. But a 315 will.
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Old 03-28-2006, 06:13 PM   #4
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How close can your tire be to the inner frame on the rear tire? Im also tring to get a big tire(slick) in the back but wasnt sure how much room i should leave between the tire and frame. I also wanted to use 15x10 wheels, with an offset to keep that deep dished look, but i never see any mustang guys running them in the rear. Any reason why?
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Old 03-29-2006, 02:12 AM   #5
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Quote:
Originally Posted by 10secgoal
About the biggest tire you can run is a 315. that's about it. And there is a little more room, but too much trial and fit, who knows if you could fit a bigger one. But a 315 will.
is that with or without the huge lip sticking out from the frame?
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Old 03-29-2006, 06:04 PM   #6
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you'll run into the inner fender and the leaf springs first before the frame. Usually the most you can get away with is 4.5-5 inches of B.S. when I moved the inner fenders, I got a 5.5 inch bs wheel in the with a 1/2-3/4 inch clearance to the leaf spring. I'll see how that works before i move the springs over any.
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Old 03-30-2006, 12:27 PM   #7
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Quote:
Originally Posted by SloAod
you'll run into the inner fender and the leaf springs first before the frame. Usually the most you can get away with is 4.5-5 inches of B.S. when I moved the inner fenders, I got a 5.5 inch bs wheel in the with a 1/2-3/4 inch clearance to the leaf spring. I'll see how that works before i move the springs over any.
I am going to swap it to coilovers in the rear. How big of a tire would fit on a 5.5 inch bs wheel?
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Old 03-31-2006, 02:07 AM   #8
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the frame is a different offset depth in the front in comparison to the rear.
it hits the uni-body-frame member.
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Old 04-01-2006, 10:03 PM   #9
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Quote:
Originally Posted by 10secgoal
About the biggest tire you can run is a 315. that's about it. And there is a little more room, but too much trial and fit, who knows if you could fit a bigger one. But a 315 will.
this is why he said a 315...315//35/17


with a shortened rearend and a the correct backspacing i got a 17 x 11" in the without a mini tub.


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Old 04-02-2006, 12:42 AM   #10
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what size tire is that? 335?
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Old 04-02-2006, 07:22 AM   #11
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He is runnung 315/35/17 on 17x11 rear wheels with 5.5" backspacing on a narrowed 9"...He's my hero...
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Old 04-02-2006, 01:02 PM   #12
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Quote:
Originally Posted by rebelgd
He is runnung 315/35/17 on 17x11 rear wheels with 5.5" backspacing on a narrowed 9"...He's my hero...

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Old 04-02-2006, 02:51 PM   #13
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Could you fit a wider tire in there?
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Old 04-02-2006, 10:35 PM   #14
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Quote:
Originally Posted by Cobra5.0Jeep
Could you fit a wider tire in there?
no way!

i have 1/4" clearance to the leaf and inner fender and a really tight tuck on the inner of the outer fender
even with a rolled fender lip i do get little rub with a big dip but my car is also lowered with a 1 1/2" lowering block. it also still has the old stock rear leafs with rear drag shock that doesn't add a lot of support. i think with the new reverse eye 5 leafs and the same shock it shouldn't take the dip so much.

now that i think about it... i never really rubbed when i had kyb's in the rear.
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Old 04-02-2006, 11:11 PM   #15
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Hmm ok. I will have to try and put my nittos on the rear of mine and see what it does. I am going to get a 9 inch and get it shortened an inch and i will run the widest tires i can.
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Old 04-03-2006, 12:38 AM   #16
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fyi

my rear end is 55 3/4" from outer axle flange to outer axle flange with a 5" backspacing on the 17x11's.

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