All right, pics of Sugino's new prototype cog design have leaked on the interwebz so I also need to post them here. It seems that they are going the Miche-way with some kind of a carrier design.
I need to add that most people who have tried what appears to be quite the similar Miche-system, often haven't been so happy about it, especially if you ride on the streets and tend to skid a lot and whatnot.
The Sugino new came from here:
"Not sure if these are out yet, Sugino rep told me it was a prototype coming out later this year. You get 3 cogs, 16/17/18 with the set, and there is no need for a chain whip, just a shimano road bb tool, which does the lockring too. To change cogs, you just take the lockring off, and the tooth section of the cog comes off laterally."
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It'll probably prove more durable than the Miche carrier system. The achilles heel of the Miche system is how spaced out the little nubbins are that hold the cog in place.
A continuous wave design like the Sugino is using can withstand much greater force, and is less likely to develop play because the forces are distributed over a much wider area.
Similar patterns are used on a variety of crank spiders including Shimano XTR and White Industries ENO.
White Industries is also producing a similar cog system, but with a much wider base to the cog and more pronounced wave pattern. It should be even tougher, but you can't install a carrier on a normal hub--you need a proprietary WhiteInd hub.
See here, here, or here.
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