4th gen mini tubbed 15x12's
10-22-2011, 12:27 AM
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4th gen mini tubbed 15x12's What I have is an 02 Trans Am. Over winter, i'm looking to mini tub my car using the Wolfe mini tubs, adjustable perches, springs, and a single adjustable anti roll bar. What I already have are the offset lower rear control arms and a double adjustable panhard bar. The rear is aprox. 4" narrower than the stock 10 bolt. I want to run a 325 DR on a 15x12 wheel.
1. What backspace will be needed to run the 12" wheel?
2. Will a 325/12" wheel combo work with a mini tub or will a full tub be needed?
3. If there is anything useful info that can be provided it is appreciated!
1. What backspace will be needed to run the 12" wheel?
2. Will a 325/12" wheel combo work with a mini tub or will a full tub be needed?
3. If there is anything useful info that can be provided it is appreciated!
10-22-2011, 08:31 AM
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I put the Wolfe tub kit in my car and the 315 wont fit but you might be ok with the 325. My rear is shortened 10" and I run 12's with 5 inch bs. So maybe 8 inch bs???? I would do some really good measuring on that!!
10-23-2011, 09:54 AM
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You might be able to get the 12" wheel but I think you'd have to cut the rear-end. When I did mine I fit a 29 x 10.5 w with a 10" wheel. There was room left side to side but the height was going to be the issue as the tire grew.
10-23-2011, 07:01 PM
#6
I did the math on this once already... here's how I figured it out:
stock rear, 15x10 wheel needs a 7 inch backspace.
So a 15x12, would need a 9 inch backspace, for the outer lip to sit in the same spot.
You can't get that in a wheel, and anything more then a 6 inch backspace, and you will have a hard time getting a tire on it, especially if you go with a beadlock, so a 5 inch backspace is optimal.
That's 4 inches off each side, to get the outer lip in the same spot. If you want to pull it in, then 4.5 inches off each side, 4.75 if you really want to pull it in.
Pulling it in this much will require the rear lca to be moved inward of the factory mount, which means move the lca brackets in on the rear. Again, not a hige undertaking. Teh PHB mount, will have to be cut off and reconstructed inwards, again not a really hard thing to do. Frame rails will need to be cut, and reboxed in, and the wolfe minitub won'treally be wide enough from what I have seen.. you're better off just getting a full tub at this point as well, and doing away with the factory tubs inner and outer. This, will require the rear 1/4's get repainted as you'll probably weld something to them.
Then, the only thing the tire will hit is the bottom in the front, so you stretch the rear 1/4 at the same time, or at least trim it a little. Or, pull the rear back and trim the bumper cover...
Next thing for the tire to hit is the top of the 1/4 where it curves in towards the hatch/roof of the car. Unless you want to run a 33 inch tire this isn't really a problem.. 31 and smaller diameter wise won't really have any problems.
Hope this helps.
stock rear, 15x10 wheel needs a 7 inch backspace.
So a 15x12, would need a 9 inch backspace, for the outer lip to sit in the same spot.
You can't get that in a wheel, and anything more then a 6 inch backspace, and you will have a hard time getting a tire on it, especially if you go with a beadlock, so a 5 inch backspace is optimal.
That's 4 inches off each side, to get the outer lip in the same spot. If you want to pull it in, then 4.5 inches off each side, 4.75 if you really want to pull it in.
Pulling it in this much will require the rear lca to be moved inward of the factory mount, which means move the lca brackets in on the rear. Again, not a hige undertaking. Teh PHB mount, will have to be cut off and reconstructed inwards, again not a really hard thing to do. Frame rails will need to be cut, and reboxed in, and the wolfe minitub won'treally be wide enough from what I have seen.. you're better off just getting a full tub at this point as well, and doing away with the factory tubs inner and outer. This, will require the rear 1/4's get repainted as you'll probably weld something to them.
Then, the only thing the tire will hit is the bottom in the front, so you stretch the rear 1/4 at the same time, or at least trim it a little. Or, pull the rear back and trim the bumper cover...
Next thing for the tire to hit is the top of the 1/4 where it curves in towards the hatch/roof of the car. Unless you want to run a 33 inch tire this isn't really a problem.. 31 and smaller diameter wise won't really have any problems.
Hope this helps.
