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Off set rims have the holes drilled offcentre to one side. This increases the low side spoke tension leading to a longer lived wheel.
If you are looking a 10 speed hubs the Shimano XTR as good as they get. The old M950 hubs are ace but not disc brake. The M965 are pretty sweet. XTR hubs are like dura ace hubs they go on and on. XT hubs are like 105 hubs they work well but not for as long as XTR hubs. DT swiss 350 hub are very good and I would probably pick those as you can put 11 speed on these too unless you plan to use a 11 speed MTB cassette on Shimano MTB hubs.
If you use triple butted spokes like DT Swiss alpine III you wont need a 36H rim/hub.
The ideal spec I think is 32H Kinlin XR31 RTS OCR rims laced to DT Swiss 350 CL or Shimano XT M8000/M785 or the XTR M985/9000 hubs with DT swiss Alpine III spokes (or spaim force if you can get them). that would be on the robust side of robust.
Thanks!
Offset? You mean what Velocity and others used to do by drilling spoke holes on the rear off-centred to cope with the dishing?
The DT Swiss are still my favourites. Those Aileron look nice too.
@scherrit did ask if I wanted 32h or 36h rear. I said I'm undecided but 32h has more choice and I've not broken any wheels (I'm not counting wearing them out) no matter what spoke count. Oh, actually that's a lie. I totalled an MTB wheel when touring Europe in 2005. That was a cheap wheel and a shop over-tensioned the spokes I'm sure.
Got to factor in the extra luggage I'll be carrying and the 'interesting' roads I might find myself on. Maybe a 36h is a better idea?
Are there any rear hubs that suit CenterLock discs? Those XTs you mention seem only 6-bolt.
Yes! XT M785 http://www.wiggle.co.uk/shimano-xt-m785-centre-lock-qr-rear-hub/