Yes the front and rears can be flipped either way on hydraulic brake axles. The races are all the same part number, but I swapped races when I flipped the rear, because I'm reusing the bearings. I've always been taught to keep bearings with there races once they've been used. If somone wanted to, they could just flip flop the bearings, studs, and seal and put the hub back on the oppisite from what it was.