I've only got three pictures of the back of the bike, but here's the details. It's a '72 frame with round swing arm. The spread is the same as a square unit. I used a 160 tire on a 4 X16-inch rim, '73 up. I needed a 1/4-inch offset trans mount plate and a 1/4-inch spacer for the sprocket.
The brake rotor is mounted with a stock spacer. Caliper & mount are aftermarket GMA, but stock will fit. The o-ring chain barely clears, but I can turn off the oiler & keep my back clean with the shorter modified chain guard.
The fender is an aftermarket blank we cut down to size and welded tabs to for mounting to the frame. It's 7 1/2-inch wide.
If the frame looks different in the seat area to other owners, it's because it's been highly modified in the seat area. but the same stuff will work on all swing arms.
Total investment in parts not counting rim & tire about $650.00. Hope this helps other old Shovel riders looking to do something different, but not too expensive. Have also used the same proccess on a '75 shovel with stock fender & struts, but with a 150 X 16 Avon.
Fits right in the fender.
–fritz
