Jump to content

Going from 18" to 20" stock rims?

Recommended Posts

My 2015 Sierra came with 18" rims. Is it just a simple case of swapping out to a 20" stock rim or is there a different ECU'tune' for the different rim sizes. The tire diameter is pretty close for stock sizes, the 265/65/18 is 31.6" and the 275/55/20 is 31.9".

Thanks for any info.

Link to comment
Share on other sites

And weight and mpg as well...



The increased weight of the rims and decreased fuel mileage is near negligible. I've not noticed any change in mine. Come to think of it, with the level kit and 20s, my fuel mileage is roughly the same. Not saying it didn't drop a couple tenths, but nothing that stands out. I'd say less than 0.5 mpg, probably. If I went with a much larger, non-O.E. type tire, I'm sure mileage would have taken a nosedive.

Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Forum Statistics

    Total Topics
    Total Posts
  • Member Statistics

    Total Members
    Most Online
    Newest Member
  • Who's Online   4 Members, 0 Anonymous, 786 Guests (See full list)

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.