After much trouble-shooting, cable ties, foam, electrical tape (what a weekend I hear you say ) I have finally got to the bottom of the loud metallic clanking that was plaguing my Birdy. It really did sound like the proverbial boneshaker and it was so irritating that I stopped riding it fell out of love with it. And I was regretting the upgrade investment from the standard fit.

The wheel went back to SRAM as they thought it might be their Dual drive hub. Repacked and re-greased it is now, finally, silent.

So the commute this morning was fast, clank-free and as enjoyable as it was the first ride.