Gear Ratios

Sturmey Archer S-RF3 parts diagram

While we cannot obtain BWR parts diagram from Sturmey Archer, we have compared the internals of BWR and SRF-3 (BSR) side by side, and found these two hubs shared many common components. The planet cage assembly, gerar ring, ball ring, and the driver are about the only parts being different. The common wear items, such as clutch, various pawls and springs, and the ball cages, are the same. 

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