I have a M101a2 that I use for work (bunk and field/camping gear)....it has the stock axle and I am running the HMMV 37x12.50x16.5 tire/rim combo on it....I also use 2" Rough Country aluminum alloy spacers in order to get the tire sidewall away from the frame, parking brake cable and the inner portion of the fender....with the 7" backspace on the HMMV rim the 2" spacer centers the tire/rim back to where the original 235x85x16 tire/rim sat in regard to the spindle/hub assembly....been running this setup for three years now behind a HMMV and my POV thru out the Gameland and Camp Mckall trails....no problems....only problem I had was with a Chinese crap steel Northern Tool tall pintle plate bending into a pretzel during a slow, wide arc backing maneuver....in an asphalt parking lot....