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Old 04-19-2018, 08:36 PM
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Would I have to do anything to my 2011 F150 to put factory fx4 20” wheels and tires on. My truck has 17” now. ?
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Old 04-19-2018, 10:33 PM
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Nope, as the wheel gets bigger the tire height gets smaller. More wheel and less rubber on the side.
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Old 04-19-2018, 11:17 PM
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It all depends on the overall diameter of the new tire and not the size of the rim. Any difference of 1" either way, I would calibrate the speedometer.
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Old 04-19-2018, 11:19 PM
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Make sure the wheels are the same diameter, or close.

This is a neat calculator for changing rim sizes. Tells you what tires you need on your new rims to keep the same wheel diameter.

https://tiresize.com/calculator/
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Old 04-20-2018, 09:10 AM
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Thanks for the replies. The tires on the wheels are 275/55r20.
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Old 04-20-2018, 01:04 PM
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Originally went with 275/55x20s.
Was satisfied and had no issues, however, when they wore-out opted to upgrade to 305/50x20s
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Old 04-21-2018, 07:36 AM
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Nice ride gDMJoe, are those oe or aftermarket wheels? They look great. I’m getting a fx4 oe 275/55x20 wheels and tires and hope they look as good as yours.
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Old 04-21-2018, 10:30 AM
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sholt - Nice ride gDMJoe, are those oe or aftermarket wheels? They look great. I’m getting a fx4 oe 275/55x20 wheels and tires and hope they look as good as yours.
The rims were available from Ford Racing Performance Parts beginning in 2008 thru early 2010. There were 4 versions
  • 20"x8½" - polished painted silver
  • 20"x10" - polished painted silver

    *Though only the 20"x10" polished were available in early 2010. Their original intention was to be the rims on the 2009 Lightnings (which were never built).
    **All versions became -OBSOLETE- in mid'2010.
There was another version that was only available on the 2008 FX2 Sport.
  • 20"x8½"
  • centers painted black chrome with a polished edge.
  • have also been -OBSOLETE- since 2010, though there are still 12 sets of center caps in a MO FoMoCo dealership - part # 8L3Z-1130-B (each)
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Old 04-22-2018, 08:34 AM
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What advantage is going to 20" from 17", other than possibly looks?
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Old 04-22-2018, 11:31 AM
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Atlee - What advantage is going to 20" from 17", other than possibly looks?
Amoung other things, handling.

e.g. Try to find a 50series profile tire in 17" with (say) a F-150 load, and performance speed rating.
.
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