flyfishingguru
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• Annapolis, MD, USA |
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• Registered on 12/31/2003 |
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• 120 posts |
• 1
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 Posted:9/7/2004 15:03 |
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Anyone know what the stock 16x7 alloy wheel backspacing is? I am considering AR23 wheels and they are 4 1/2"
I am running 305/70-16 tires and in a lock to lock turn I have about 3/4" clearence from the back edge of tire to the I beam(truck is 2WD) Am I correct in assuming that if the factory rims have less backspacing, the new wheel having more will result in more I beam clearence as desribed above, thus allowing the wheel to sit out side the wheel well a bit further? BTW, the truck does have a Fabtech 4" lift.
Thanks guys
Scott
Scott
2003 Excursion XLT , Fabtech 6" Lift Kit,,Gibson Catback Exhaust ,K&N Air Intake, Alpine/Infinity/XM System,Roof Clearence Lights, "C" BETR Mirrors,Thule Roof Rack, Eddie Bauer Grille, Husky Floor Liners , American Racing Outlaw II 16x8 Wheels and 33" Goodyear ATS Tires |
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dnevins
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• Subscriber since 12/29/2009 |
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• San Diego, CA, USA |
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• Registered on 12/28/2009 |
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• 340 posts |
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You have backspacing backwards, which matters here. Backspacing is the distance from the wheel's mounting face to its inside rim edge. More backspacing moves the whole wheel in toward the truck, so going to a 4 1/2 inch wheel from a stock wheel with less backspacing will cut your 3/4 inch of I-beam clearance, not add to it. Less backspacing pushes the wheel out, away from the beam and toward the fender.
To find your stock number, measure it: lay a stock wheel face down, put a straightedge across the inner rim lip, and measure from the straightedge down to the mounting pad. Do the same for any wheel you are considering and compare.
With only 3/4 inch now on a twin I-beam 2WD at full lock, I would not go to more backspacing than stock with a 305 tire. Pick the new wheel by that measurement, and check clearance at full lock both ways and with the suspension compressed before you drive it.
Dana
https://partslogic.com |
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