I saw those yesterday. I did not think they would fit at first glance. The air chamber looked wrong to me.
But, I did some sleuthing based on the non and manufacturer part numbers and it looks to be made by Navistar (not Meritor) for a m1249 MRAP recovery vehicle. I do not know much about the m1249, but from the images I kicked up on Google, it looks to be another platform and my guess is that they won't fit an A0 FMTV.