Just rode it for an hour on dirt except for a mile or so of pavement. Bar too low; need an upriser stem of about same length to get bar higher and a bit closer. Higher and closer, the 54 cm will be pretty just-right, tho' my left palm has always started tingling after 2 to 10 miles, depending on the type of "anything-except-drop" bar. BUt after 11 miles, my palm is just starting to tingle. I'll replace the stem, then if that does not suffice, consider a bar with some fore/aft bend.
WTB Rangers (3") are quite nice! The outer knobs rub delicately on the chainstays when I corner of hit a hard bump, but this is a beater, and I am sure that those stays are not .4mm thick. Let 'em rub! The Rangers roll relatively fast on pavement (sure, the gear is only 64" and the crankarms are, I think, 180s, but still, compared to other knobbies, these do seem to roll fast -- better, even, than the nice Maxxis Ikons that I installed on my erstwhile late-Santa-Cruz-era (1996) Bontrager Race Lite. I am chuffed! And the fatness (sounds like the KJV) just makes the ride plush and smooth, even if slow and somewhat plodding; it's nice plodding.