Definitely will end any HTII BB, I guarantee it,
not true at all ,yeah true if you buy them and stick them straight on your bike without repacking them with a waterproof grease like wurths graphite grease-which if all the grease is washed out then the graphite continues to lube the bearings,alaskan mining equipment has used it for years..,and good old copper grease on regular threaded bolts and control cables will stop anything gumming up,alaskan riders ride through 6 months of wet cold water and have proved sealed bearings repacked will last a few years (10,000+ miles out phil wood BBs)
god i thought mountainbikers were hardy all weather types?,up for adventure and exploration? 😉