See the rear tires being switched on/off by AWD, I assume that the front tires would be the "option"
PC, Yar 87 AWD bug?
@JTT No, that's what I thought initially as well, but this is normal & realistic, and it's been discussed before. The rearmost axle is the add-on in this vehicle design. So it's basically a 4x4, with an added axle in the rear that can be disengaged.