theres a good reason why M960 was re-worked after such a short time period into M970. namely that the seals were rubbish (numerous friends to testify to this). given the large price difference again its amusing that UN72 is a better BB, espically as the entire essence of external BBs is supposed to be lengthning BB life by placing the bearings further apart.
I wish more companys could be more like chris king & phil wood. IE rather than rush inferior products to the market place just to make sales, give a lengthy testing period until the product is properly fit for use.
I'm told that some of new newest raceface ISIS BBs have v.good life expectancy. I'm not against the outward bearing concept; I just want to see a better useable solution. I guess I'm also sticking to square taper as the new standard also seems to have adopted 4bolt instead of 5bolt microdrive that doesnt allow for my favoured 20 & 30T chainrings.... anyone whos ridden the first climb of the black mountains killer loop or at high alltitude will appreciate that
WTD- Shimano M980 XTR Rear Derailleur