Very helpful... Ok, how much have you got to spend? Do you want to run front freewheel? - Fixed hubs, Zoo, Onza, Echo etc. Or have a rear freehub? - New Zoo, Echo ones etc, Profile, Chris King. Fixed hubs range from £15 (T-Pro- shit) to £75. If i was you, i'd go for the T-Master Hub. £30, sealed bearings. Does the job. If you want a freehub, and losts of money I'd go for the Profile, if you have enough. Bit of a biased opinion, as I have one. But it's never badly skipped on me, only between engagements when riding on flat ground. I haven't even serviced it, taken it apart, anything! and it's been fine. Not to sure on the Zoo! ones etc, they're all the same, just have different labels on them.