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Old 09-09-2013, 09:48 PM
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LowUFO LowUFO is online now
Dodge Ram Forum Member

 
Join Date: Aug 2012
Location: Toronto, ON
Age: 46
Posts: 1,780
Gender: Male
Vehicle: 2012 Dodge Ram 1500
Trim Level: Sport Crew
Color: True Blue Pearl
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
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Yeah, wheels have nothing to do with which gear ratios are spec'd on the vehicle. I have a Sport Crew w 20s and 3.55 gears.
Yes, you'll need to recalibrate your speedo because the difference in tire diameter is 1.4" and circumference is 4.4%.
And yes, swapping your 17s to 20s will not be an issue clearance-wise.
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