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Hi Tom, 1. I don't know about "high and low" fenders. As far as I know there were only two different fenders used on the B and I wouldn't refer to either as "high or low". There is the standard style fender that you commonly see and there is the wide fender that was used if the tractor was originally supplied with steel wheels. The wide fenders are nothing more than standard fenders that have extensions spot welded to them that at least partially cover the top of the rear wheels. 2. I think that the humps were the standard for the rims for standard rear tire sizes. That's what my '42B has. You probably want the humps if you have the attaching clamps, two of which are adjusted with cam bolts. I don't know what the loops are unless they are an aftermarket rim that attaches directly to the hub with standard bolts and no adjustment. They are not spinout bars. As far as I know they are just tabs with holes in them for attaching bolts. 3. There were two different hubs used. One is a heavier casting with four v-shaped cutouts on the periphery. Those are the hubs that were used with the steel wheels. The steel wheels were attached with tabs that had holes in them. The four cutouts were needed in order to enable setting the wheel position on the inside of the hub. There are four different rear wheel track widths possible on the standard B. Two outside the hub and two inside. The lighter hub castings only had two of the cutouts and were used with the standard rims and tires. If you are only looking for one side, you probably should try to match the side you already have. If you wish to see some photos of the wide fenders or the hubs with four notches, I can post some pictures of my '42B. If you have no fenders at all, see if you have the tall air cleaner intake stack. The tall stack sticks up above the hood about a foot. That tall stack was also unique to the B on steel. If you have that air cleaner and it is original to that tractor, you want the wide fenders and the hubs with four notches to be precisely original. Mine was originally on steel and Dad converted over to rubber not long after he got the tractor. Rod
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