Put ~1100 miles on the fat since January. All.Beach.Miles. Been through 2 chains, 2 rear d pulleys, swapped in a new GXP crank & BB after destroying the cartridge bearing. Also slowing trashing the pedals. All in all though, incredible exercise, cardio, and all off road.
Running 1 x 10 with 22 low up front 11-34 outback. Eventually settled on 15 psi to power through wheel ruts left by 4WD vehicles though it takes some serious cardio to walk 15 psi through soft stuff. I occasionally drop to 5 psi summer months (dry soft sand).
Duct tape keeps sand off chain & chainwheel. I don't splash through water 'cause salt 'n sand. One thing about tire size...I weigh 195 and beach riding is tough. My H-Billies at 4.6 wide have 4" effective width. Going to 4.8" (max on the Min 3.0) wouldn't make
any noticeable difference. Me dropping 40 would LOL.