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Old 09-21-2004, 08:32 PM
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Tubbing a GM 12 bolt

i looked for a thread but i prolly missed it and if i did i am sorry. well here goes. i have a gm 12 bolt rear and i was wondering if it is possible to tub it or mini tub it *dont know the difference* without having to have the unit sent out and shortened. i am goin to move my springs and all to the inside of the framerail and but new wheel wells in.

thanks for all your help and sry again if this was already a thread.

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Old 09-21-2004, 08:37 PM
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What car?

When tubbing a vehicle it only makes sense to narrow the rear.

Mini tubbing is mainly to fit slightly larger tires, so it may not be neccesary to narrow it.


Not a project for an amature.
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Old 09-21-2004, 08:47 PM
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its a 1980 chevy c-10 pick-up. i currently have 13 inch wide tires on there and i have about .5 inch of clearence on the outside of the fender and 2-3 inches of clearence on the inside. the problem i have is that i dunno know how to move the rims back...... wheel spacing is like something i havent the slightest clue about.

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Old 09-21-2004, 08:50 PM
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Get different offset wheels...................the guys at the wheel store should be able to explain what you need.
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Old 09-21-2004, 08:51 PM
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thanks u very much for your help....i greatly appricate it.
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Old 09-22-2004, 06:35 AM
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A "flip-kit" and new spring pads welded on your axle, along with spring hangars mounted to the bottom side of each framerail will net you close to 4 inches per side without bothering to have the axle cut.

You could then go for a set of wheels with as much as 7 or 8 inches of backspacing.

Just a cheap way out.
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