Sorry sleepyT...I have been off forum for awhile....and just now seen the post. Well as you have the new truck now...nice looking by the way.... I guess you do not need me to measure. I have the 4:10 in mine and running around 68-70 I get around 8-9 mpg pulling the Rushmore. I have upgraded to G114 tires and disc brakes. I am considering installing the mor-ryde independent suspension in the next few years. You will LOVE the truck....I went with the B & W puck hitch on this one based upon my experience with the B & W companion on my 2011....
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2015 Rushmore Springfield
Disc Brake upgrade, Goodyear G614 tire upgrade
RV FLEX-ARMOR roof, Mor-Ryde IS suspension