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post #1 of 7 Old 05-16-2013, 07:19 AM Thread Starter
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Wheel offset help

I have a stock 2008 f250 CC. I am looking at 20x9. My tires are 285/65. I need to see what offset is best 0 or -18? I don't really want them sticking out, but I also don't want an rubbing. Should I look for a wheel with a positive offset??
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post #2 of 7 Old 05-16-2013, 07:53 AM
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Look for as close to stock back space as possible..6"
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post #3 of 7 Old 05-16-2013, 09:58 AM
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A +25 offset will give you a 6 inch back space on a 9 inch wheel. A +32 will give you a 6.25 inch back space. If the stock back space is 6 inches, then +25 is where you want to be.

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post #4 of 7 Old 05-16-2013, 01:35 PM
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A 20x9 with a 0mm offset will stick out about 3/4" beyond your fenders. A 9" wide wheel with a -18mm offset will stick out about 1.5" beyond your fenders.

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post #5 of 7 Old 05-16-2013, 01:53 PM
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Quote:
Originally Posted by Discount Tire View Post
A 20x9 with a 0mm offset will stick out about 3/4" beyond your fenders. A 9" wide wheel with a -18mm offset will stick out about 1.5" beyond your fenders.
Are you sure about that? A 0 offset would be a 5" back space and a -18 would be about 4.25" backspace. The OP said he has an 08 and if I'm not mistaken, the OEM backspace for an 08 is closer to 6". Based on that, a one inch wider wheel (OEM 8 to after market 9) and a an inch less of backspace is going to move the rim lip out 2 inches or 2 inches depending on what the OEM backspace is.

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post #6 of 7 Old 05-16-2013, 03:16 PM
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Quote:
Originally Posted by Karls03 View Post
Are you sure about that? A 0 offset would be a 5" back space and a -18 would be about 4.25" backspace. The OP said he has an 08 and if I'm not mistaken, the OEM backspace for an 08 is closer to 6". Based on that, a one inch wider wheel (OEM 8 to after market 9) and a an inch less of backspace is going to move the rim lip out 2 inches or 2 inches depending on what the OEM backspace is.

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My estimations are in reference to the fenders edge, not from where the OE wheel sits.

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post #7 of 7 Old 05-19-2013, 12:04 AM
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Quote:
Originally Posted by Karls03 View Post
Are you sure about that? A 0 offset would be a 5" back space and a -18 would be about 4.25" backspace. The OP said he has an 08 and if I'm not mistaken, the OEM backspace for an 08 is closer to 6". Based on that, a one inch wider wheel (OEM 8 to after market 9) and a an inch less of backspace is going to move the rim lip out 2 inches or 2 inches depending on what the OEM backspace is.

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Quote:
Originally Posted by Discount Tire View Post
My estimations are in reference to the fenders edge, not from where the OE wheel sits.
Well the stock wheels are only sucked in 1/2" from the fenders... So your first post is quite a bit off.

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