Grumbling Brompton "freehub"

[wafter]

I've noticed some roughness and noise when freewheeling on the (6sp) Brompton. This happens in all of the three hub gears so I assume is something to do with the freewheel setup.

I was under the impression that these had some weird dual-freewheel setup whereby this facility exists in both the hub and a freehub onto which the sprockets are fitted - can anyone please confirm that this is correct?

I'm reasonably happy stripping / inspecting / cleaning / relubing a freehub; less-so the 2sp hub itself...

Any resources on this would be much appreciated

Ta!

 

[gom]

It is my understanding & experience that S-A hubs are just noisy, and maybe do sound as if all is not well. The three ratios may sound different to each other, but none is silent when freewheeling. I fairly recently got a new 6-speed, replacing an old 5-speed, and feared something was up, but I had a service and advice (from a shop other than where it came from) and am assured all is fine.