There are 3 different rings on a drum hub-
1. The one between the 2 bearings (unless latest type bearings with integral spacer) MUST be in there. Or the bearings will chew out and then hub nut come loose.
2. The outer thick one with chamfer inside (goes up against the drive flange) MUST be in there. Or the seal won't seal.
3. The inner split one (between bearing and seal, on CV side) you could do without, as long as the seal is in the right place- ie not pushed in hard. Often these rings are missing on old cars.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.
