"S. Anderson" <
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> "JP" <
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>
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> >
> > Seems to me that the AC hubs are an extraordinarily logical alternative to the "bicycle
> > industry" standard. I'm not so sure that it does know what it's about, but perhaps you have
> > rigorous experimental data proving that the AC design does not work.
>
> I'm not sure there's a problem really. Dished wheels still hold up pretty well to the daily use
> and abuse that we all serve up. We don't see a profusion of destroyed rear wheels generally. It's
> a trade-off really, isn't it. On one hand, you can run minimal or zero dishing, but you're going
> to be stuck with 5, 6 or narrow 7 cassettes. OTOH, you can have dishing and get a 10 sp cassette.
> Dishless may be somewhat stronger and certainly more elegant in design, but maybe people prefer
> 10sp over 6 or 7 and that's why 6 speed is as dead as the dodo.
Don't the AC hubs support 10spd cassettes? Their claim is that narrower flange spacing on the
non-drive side makes the wheels stronger because it allows a more balanced spoke tension, more than
making up for the supposed weakness from the narrower spacing. This would be the same effect as
taking a longer axle and putting spacers on the non-drive side to create more balanced spacing.
But I really don't see the requirement for 10 speeds on the back of most road bikes. A 7-speed
straight block will meet most racing requirements, especially when combined with a 39 small front.
When you get into something mountainous you space out the lowest 3-4 cogs, or go to a triple.
Besides, you can get 8 speeds in the old 126mm spacing with 9 speed cassette spacing, and if you
designed for it you could probably get a 9 using 10 speed cassette spacing. So is it better to use
the extra 4mm for ten speeds, or would it be better to use it to space out the non-drive side? It
would sure make wheel building less challenging (more room for error) for those of us who average
building only a single pair of wheels per year, but I don't think Shimano designs their equipment
with me in mind. This all brings us back to the question of whether current mainstream bicycle
practice in rear hubs is the best practice.
Or maybe they're just making
> a cash grab by making you "upgrade"! ;-)
Could be. I still think that there is very little advantage in cassettes over freewheels, especially
if the axle is beefed up where it should be a la Phil. The biggest advantage I could see would be if
you could buy a cassette kit where you could mix and match your cogs- somewhat easier with a
cassette- but Shimano don't want you to do that, do they?
JP