Steel Soldiers Supporter
Not so sure, I think 10" won't fit, IMHO........do yourself a huge favor and make sure you have 10" wide bead locks.
The A3 wheel measures exactly 11 inches from (rim) flange to flange, and the bead thickness of a typical 395 is more or less 1-5/16". With the tire mounted - and beads well seated - that leaves 8-3/8" free space in between them. So your beadlock should be anything between 8-1/2" (for PVC) and about 8-3/4" (say maximum 9") if it was rubber.