Tire ??

[lineman49]

   Don't know where to ask this.    This has nothing to do with fishing (sorry) but I am wondering if anyone knows this.?   Can I replace all 4 of my P265/65R-18" tires with 4 new P255/65-18" on a 2016 GMC  Yukon without screwing up the vehicle computer or anything else??   Thanks for any info.!

[LakerTaker]

You will lose about 0.45 inches in tire diameter,  and you will be going about 54 mph when your speedometer shows 55 mph.  I don't think you will screw up your computer otherwise. 

Here is a tire size change calculator:  http://m.roadkillcustoms.com/tire-change-speedometer-change-calculator/

Edited February 28, 2018 by LakerTaker

[MCF]

As agreed with the above post.  Most people typically drop a size or two for winter tires with no issues.  Like I have on my Silverado.  You are just doing it year round.