The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Bigger tires

76stepsidechevy · 04-27-2012, 09:06 PM

I just went from 33s to 35s and I saw an increase. My daily commute is pretty much all highway though. I dropped about 300 rpm so with 3.73s and no od I run about 2200 at 65.

04-27-2012, 09:06 PM	#6
76stepsidechevy Registered User Join Date: Nov 2010 Location: Windsor Locks Posts: 628	Re: Bigger tires - better gas mileage? I just went from 33s to 35s and I saw an increase. My daily commute is pretty much all highway though. I dropped about 300 rpm so with 3.73s and no od I run about 2200 at 65.