1930 Rear Brake Drum Hub Type/Style

[SteveW]

I'm looking for information on these two different styles of Model AA Rear hubs, why the difference ? See attached photos ....



Thanks
Steve

[Bob C]

I wonder if the one on the right ws used with the 1931 spoke wheel?


I guess not, the spoke wheel drum looks totally different.

[john charlton]

If you check the "Service Bulletins " you will see when the early AA " scalloped " hub on the new bevel gear rear axle was changed . This early hub was causing wheel hub area failure with heavy loading . A stiffening plate was issued in service to prevent failure . Your pictures show both early and late styles .

John in West Drayton London sunshine and showers .

[SteveW]

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Thanks John for the information .......
Regards
Steve