Why does buying a hub have to be thought of in this lifetime-length scale. OMG WHAT IF THE UNIVERSAL WORLD ORDER DOESNT REARRANGE ITSELF AROUND MY HUB?? How long do you people think youre going to keep this thing, how long do you think a cog takes to wear out? Just go buy 3 of each cog between 13 and 17 and youll never ever think about it again. Since you're planning on riding this thing for forever, the extra expense amortizes very easily. hub (250) plus cogs (150) / infinity = 0.