Hi there.

i recently built up an RX-RC5 5-speed coaster brake hub and it started making a clunking noise when heavy braking pressure is applied. It sounds as though the brake shoes are hitting an edge inside the shell. I've experience this problem before on an S-RC3 hub and never understood it or found a solution.

The bike has steel fenders, so the sounds gets amplified a bit.

I've attached a video so you can hear the sound. This hub is brand new and ridden for about 2 weeks.

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Light braking pressure doesn't make such a loud noise.

I searched google high and low and didn't find anything. This is my last resort before chasing up Sturmey Archer technical support.

thanks!