nope it works in front you can adjust the wheel bearing load so there isnt any play like i said i had problems with that setup in the rear when wheeling hard with 42s i dont think they would be any trouble with them on a street trail truck
That is the play in the bearing cup, when the axle is bolted in the is a small gap between the bearing and the housing end. You need to figure out what the gap is and fill it with a shim behind the bearing in the cup. My rear discs work fine on road, offroad with all the twisting it pushes the pads apart and I have to pump the brakes.