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Looking for a safe backspace.

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Old 03-25-2009, 03:39 PM   #1
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Question Looking for a safe backspace.

What is a safe backspace in an after market rim? I have a 06, TRD off-road, AC, w/ 3 lift. Im looking at 285/75/16 M/T tires on 16x8 rims. Would a 4.5 backspace be my best bet? What about the offset, is that different from the backspace? Should I expect to trim? Ive looked all over, and had no luck. Any help would be great!
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Old 03-29-2009, 05:13 PM   #2
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From what I've read, most seem to go with 4.5" bs on aftermarket wheels. Stock is 5.5". for 285's you might still rub a little but nothing a little trimming wont' fix.

Backspacing is the measurement from mounting surface to the inside of the wheel rim (closet to the engine). So less backspacing pushes the wheel out further. Offset is the measurement from the mounting surface to the centerline of the wheel.
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Old 03-29-2009, 07:24 PM   #4
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Yep, 4.5" backspace and anything with a negative in offset, ie. -12mm offset, should be good..

Yes, offset is a different measurment than backspace. Backspace is the amount of space from the rear of the wheel to the wheel mounting surface.

Offset is where the wheel mounting surface falls in relation to the centerline of the inside of the tire mounting lips.

This completely confusing explanation was brought to you by the letter R
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Old 03-30-2009, 12:28 PM   #5
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Thank you guys, now I’m getting it.
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Old 03-31-2009, 08:00 PM   #7
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hey longbow could u post more pics of the truck to see what the wheel look like? maybe u can provide the backspacing and size lift you have... id really appreciate it
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Old 04-01-2009, 08:28 PM   #8
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Hey Longbow, those are some sweeet wheels, By the way "Longbow" is the name related to your choice of hunting weapon, or is it just a name?
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