I "test" ran the only two BD bikes that I bought while they were still on the stand, to make sure that the OP's mechanical issue would not happen to me. My problem with the two online bikes wasn't so much mechanical, but their poorly designed frames, wheels, stems and forks, in their having excessive flexing issues, that one cannot really deduce from photos, and only from an actual test ride. Needless to say, I now buy from my LBS, so I can physically check out and maybe test ride the bike first.