Strumey Archer (SA) gear hubs dates back to the early 1900s. In 1902, the first SA hub was produced. It has been commonly used in the good old English bicycles. Till now the SA 3-speed hub design remains mostly similar.
Brompton uses mainly the Brompton Wide Range (BWR) or 3-Speed Freewheel Rear Hub (SRF3), which are manufactured by Strumey Archer.
Drawing shows the construction of an early SA 3-speed hub.
The advantage about having an internal gear hub is that all moving parts are sealed inside the hub shell, keeping the entire mechanism safe from corrosion and damage from external elements. Over time, however, the hub needs to be serviced to keep it running smoothly.
At CycleLogy, we are able to overhaul your Brompton hub, thus prolonging the lifespan of your precious Brompton bicycle and allowing the hub to work like a new one again.
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If you are reading this blog, chances are you are thinking of getting a road bike or have already gotten a road bike. As a cyclist, it’s imperative to familiarize yourself with the differences between bike fitting and bike sizing. These terms are used by bike shops and professional fitters for the following reasons.