Originally Posted by 99dodge318

id say 4.88's with 37 mud terrains, did you know bfg mud terrains (assuming you have km2's which are notorious for being smaller than advertised) are the heaviest mud tire for their size? if you purchased some all-terrains of the same size youll gain at least 1 mpg.

but anyways i have 3.55's which more than 90% of rams came with, and with 35'' tires at 65 mph im at around 1500 rpm's.

my speedo is also off by 7-10 mph (i use a gps) so when im doing 65 my STOCK speedo says 55

Originally Posted by thompson1986

65mph ant 1500 RPM? with my 33 super swampers i was getting closer to 2.5k at that speed if i remember correctly