Tinea: What I meant to say was that albeit a short ride, what little I experienced was great
tochnics: I think you are very right on that one. At first I thought the sound during sprints was from the brakes rubbing, but it was of a different nature for that to be the case. I'd guess it was some sort of "rubbing"/grinding noise related to the bearings.
Also the RH-550 rear wheel would not spin freely for very long.. lots of vibrations and generally odd noises coming from the bearing.
And again, thanks for the compliments!