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11-02-2007, 03:47 PM
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Senior Member
Join Date: Aug 2004
Location: Everett, WA
Posts: 2,316
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OEM wheel size fitting question
Not sure if anyone can answer this or not, but...
On my 2006 GMC swb reg cab I have a 2"/4" lowering kit installed. I am currently running a set of the 17" Denali rims with the tires that came stock on my truck - 245 70 17. These are ~30.5" tires by my calculations. I have been looking for a set of OEM rims in a larger size, 20" I suppose? The set I am currently looking at have 275 55 20 tires on them. These are ~31.9" tires by my calculations. My question(s) is with the set-up on my truck now will I have any clearance issues if I run the tires for a while? I am more concerned with width than hieght. How much of a difference will this make on my speedo? If the tire size is ~4% different will this equate to a 4% difference on my speedo; when it says 60mph I will actually be going ~62?
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2009 Honda Fit CfC (bsf 44.9 mpg) 2000 Tahoe Limited 1991 GMC CrewCab Dually 2wd, will end up swb, not dually and replace CCswb below 1991 GMC CrewCab Dually 4x4, just going to fix things up for now 1982/1989 K5/GMC Jimmy 2wd 1987 GMC 1/2 ton swb 2wd Crew (sold) |
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