It has dual wheel adapters, 8 lug to 6 lug.
Look at my picture of my bus, it has the same type of rear wheels. An adapter goes from 8 lug to 6 lug and the dual wheels on the rear have 6 lugs and they are 17" wheels.
I went to put 8 lug 18" wheels and tires on the rear of the bus, took off the adapters, and the "track" of the tires and wheels was too narrow. So back when on the adapters and the old tires and wheels.
I have some 18" 8 lug budd type wheels for a 3800 but I am thinking that you need the extra space the adapter gives you to proper clearance on the wheel wells of the wrecker body.
Jim in Springfield, MO
