74 / 105
73
Wheel Type Identification
Hub Piloted Disc Wheels
Hub Piloted disc wheels are designed to center on the hub at the center hole or bore of the wheel. The wheel center
hole locates the wheel on pilots built into the hub. Hub piloted wheels are used with two piece flange nuts which
contact the disc face around the bolt hole. Only one nut on each stud is used to fasten single or dual wheels to a
vehicle. All stud and nut threads are right hand. Hub piloted wheels have straight through bolt holes with no ball
seat, which provides a visual way of identifying them
Stud Piloted Disc Wheels
Stud piloted disc wheels are designed to be centered by the nuts on the studs. The seating action of the ball seat
nuts in the ball seat bolt holes centers the wheels. Stud piloted dual wheels require inner and outer cap nuts. Fas-
teners with left-hand threads are used on the left side of the vehicle and those with right hand threads are used on
the right side of the vehicle.