Do the FJ wheels offer offset? I had KM2s on my wrangler. Very good tire off road! Also less noisy than general grabber at2. However they r E rated. Very stiff plus it was jeep! I couldn't take as my dd.
I believe the FJ Cruiser wheels push the rims out .5 in or more than stock 4Runner rims. I have 265/70/17 BFG KO's now with same E rating, I do expect more noise from mud tires. I thought BGF mud terrains were rated at C?
The km2 will please you on the noise rating and the off road performance. My issue was how rough it made the jeep. You felt every bump in the road. My advice would be to inquire about something other than e rated and if that isn't possible run less air. Reduction in mpgs but your brain won't bounce around in your head. I'm serious when I say it was a stiff ride. I ran the tires at 29 pds. Keep in mind I was running a 2006 jeep with the km2s.