Mike, I suppose some parts could be missing but there is no arm for leverage or any type of sliding arrangement, just a "U" shaped stationary rack and a swinging support that hangs on threaded eye bolts with large wing nuts to take up the slack. It looks similar to a spare tire rack you would find on semi-trailer. And your right about the weight- I'm guessing 120-150lbs. The one I have is a Michelin 9R22.5 traction tread on the original steel wheel. My beer truck driver/delivery days are over, I used to be strong but under the truck is an awkward position to wrestle with that thing. Bob


1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy