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.
There's two independent points there (IMO) - the wider spacing and the sealing of the bearing itself. From an engineering prespective the wider spacing and larger bearing will alway last longer than the smaller narrower assuming
all other things are equal (ie sealing, materials etc). The sealing of the 960 BB or seals themselves is sometimes reported to be suspect, however in my personal experiences having them on a couple of my bikes this hasn't been the case. While the UK may be considered a cold, dark, desolate place and harsh on equipment, I drown my M960s of a regular basis (parts of Tassie are very harsh too) and they have outlasted my UN72s. It is also easy to take the seals off and clean and regrease the bearings should the need arise.
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.
Is that the same Chris King which spent 10 years developing a still born BB and is still developing a 1.5 headset?
I think in the current market 4 years for a product is pretty good and while M960 wasn't perfect I'd hardly say it was rushed to the market (it was tested for a long time). Raceface X-type on the other hand...
I'm told that some of new newest raceface ISIS BBs have v.good life expectancy.
Based on their offerings over the last few years I wouldn't touch them. the best ISIS BB I've found is the SKF ones. Haven't met anyone who doesn't rave about them.
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
Sorry can't comment on that killer loop, but am happy to join you on it if/when I make it to that part of the work, and am happy to show you some of my killer loops too
f'kin ell this thread IS going on
king have massive experience in headsets, so yeh didnt take too long to make a 1.5in.
you mention yourself you dont have any experience of the new Raceface, from what i've heard the new stuff is supposed to be pretty good.
I go to Oz once every 2yrs or so... although to be brutually honest I wish I didnt have to, vastly prefer the US or NZ. nothing personal
but I'm sure tassie gets as sh,te weather as wales
i'll give ya a shout if i'm in sydney next year (kingroon as well) & we can hook up for a ride.
personal experiences are all very well. but as this thread stated at the start, ISIS hasnt got a great rep. & until a viable alternative comes along I'm sticking with my zero problem freebee square taper alternative
WTD- Shimano M980 XTR Rear Derailleur