Hub Locking Ringrear as fitted to BSA Unit singles with QD splined crinkle hubs and BSA A50 & A65 models from 1966-70 (this version of the hub had the bolt-on sprocket ring). Not suitable for the earlier or later hubs. It also fits the Triumph TR25W 1968-70 models.
Diameter: 1 1/16″
Thread: LH
MADE IN ENGLAND
OEM: 37-2305, 68-6081
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