Originally Posted by JXB
They are very high quality. I don't think it is the hubs but it may be possible.
Mike Hadley's hubs are fairly easy to service so it would be worth while to give them a quick cleaning, inspection, and relubrication with a light oil or perhaps a 50/50 blend of Phil Wood waterproof grease and tennacious oil to see if that solves the problem. Even a few pair of Santana's brand new Sweet 16's were recently discovered to have been over-lubricated with a heavy grease instead of the appropriate type of oil. The thick grease kept the pawls from fully engaging the ratchet ring and caused the same type of "slippage" under heavy climbing conditions that you experienced. In fact, as I now recall, at least one set of our Phil Wood hubs had the same ailment many years ago right out of the box: it was caused by a slightly offset ratchet ring.
Again, if all the other bits and pieces of the drive train are in good order -- no bound-up chain links, no bent cogs, no excess cog or chain wear, and the rear derailleur is dialed-in and not rubbing against the cassette's largest cogs when you're in the 34t cog -- it's the only thing that comes immediately to mind per your description of the problem.
Last edited by TandemGeek; 10-03-05 at 08:52 PM.