5 X 1-1/4 Grey flat tread Performa Rubber Wheel 3/8 BB
4 x 1-1/4 Pro Wheel 1/2 PBB
4 x 1-1/4 Protech flat wheel 3/8 PBB
3-1/2 x 1-1/4 Performa wheel with Delrin bearing 3/8 bore
