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Want Taller Tire

smit303

By smit303
in Modifications & Accessories

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smit303 Enthusiast

smit303

Posted
Posted

Will a 275/60/20 fit on 2014 Sierra without a leveling kit? How bad would gas mileage suffer? Speedo off alot?

MThompsonjr115 Enthusiast

MThompsonjr115

Posted
Posted

Will a 275/60/20 fit on 2014 Sierra without a leveling kit? How bad would gas mileage suffer? Speedo off alot?

I've got 275/60R20 Duratracs on my truck without any suspension mods. They fit well, but rub on my WeatherTech No-Drill mud flaps in the front when turning sharp. The rub is not bad at all, just a little audible.

 

The tires are about 10lbs heavier each when compared to the OE tires. MPGs dropped a bit and acceleration slowed as well. I believe the speedo was off nearly 4 MPH at 70 MPH, but maybe it was 3, I can't recall. I've got a DiabloSport Intune to fix that.

 

I'm a huge fan of the Duratracs though, a bit loud, but not crazy or overbearing. Grip is great on all surfaces including ice and snow. They are tough as nails too... they laugh at our MI potholes.

 

 

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lobstermen Enthusiast

lobstermen

Posted
Posted

I have the exact same tire as you exempt I have a ready lift 2.25 front and block in rear. What r u seeing for mpg? My truck says 13 mpg but I didn't recalibrate for larger tires.

MThompsonjr115 Enthusiast

MThompsonjr115

Posted
Posted

I have the exact same tire as you exempt I have a ready lift 2.25 front and block in rear. What r u seeing for mpg? My truck says 13 mpg but I didn't recalibrate for larger tires.

I'm assuming you're asking me...

 

I put them on when temps started dropping so my mileage wasn't really all that great. In traffic I was seeing 12.5MPG uncorrected on 87oct. After I put the InTune on and ran the MPG tune, I was seeing 13.5-14.5MPG.

 

I'm currently running E85 on the 87 performance tune and I see 11.5-12MPG.

 

 

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