Full Speed Ahead HG Freehub

This freehub is specifically designed for FSA PRA (Preload Reduction Assembly) hubs. Before purchasing, verify that your hub is an FSA model featuring the PRA system, as it will not fit standard hubs from other manufacturers.

Yes, the HG (Shimano/SRAM) interface on this freehub body is compatible with standard 8, 9, 10, and 11-speed cassettes. If you are using a 7-speed cassette, you will need an additional spacer behind the cassette to ensure a secure fit.

If you have basic bike maintenance tools—specifically a cassette lockring tool, a chain whip, and the appropriate hex keys or cone wrenches for your hub—you can likely perform this swap yourself. However, if you are uncomfortable removing the axle or dealing with pawls and springs, a local shop can handle the installation quickly.

You should consider a replacement if you notice excessive play or 'wobble' in your cassette, skipping under load, or a grinding sensation when coasting. These symptoms often indicate that the internal bearings or the pawl engagement mechanism are worn out.

This product is typically supplied as the freehub body shell itself. It is best practice to inspect your existing pawls and springs during the swap; if they are worn, you should source a compatible service kit to ensure optimal engagement.