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edscoble
JurekB
Not sure it is the mdgrd, Ed. I've had mdgrd noises before, following a clumsy fold, and this isn't synonymous with one of those.
I'll put money that it is metal on metal - very high pitched and quite jarring. I wouldn't mind if it was a nice noise - but it is not.
I am hoping someone might say 'I know what that is - I had it on my Brompton' to save me going through the process of systematically covering all mating surfaces on the front end of the bike with grease and then test riding it....