Grant wheels
I don't know who or how many companies fabricated these wheels or rollers but they were made in a bit of a hurry. I've encountered different internal diameter (the centre) and fairly rough machining not that it affects their role in any way. Also the centre spacers that clamp between the bearing inner races - I've seen some nicely machined all over and some just round bar still with mill scale bored out for the axle bolt and faced off to correct length.
I've also heard that the inner spacers vary slightly in length and if they get mixed up the twin ball race bearings at each end can nip up which isn't good. Later roadwheels of the Sherman type I think had tapered rollers.
Regards
Alex
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