Enclosed chainring?

Anyone know what the chainring system Aaron Chase uses in the "Triktionary" DVD? It appears to be like an enclosed chainring with no chainguide devices etc, that the chain goes through.
Any info would be appreciated
Any info would be appreciated
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ForBloodAnd Empire
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I'm not entirely sure though but I think that has an enclosed chainring.
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You can easily do it, take one chainring and 2 bashguards of the same size and using longer chainring bolts, put one bash on either side of the chainring.
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Although that may work you would have to fit spacers between the chainring and the inner bashring to allow clearance for the chain. You would also have to be careful about clearance of the chainstays. The bolts that long would be hard to get and I would have concerns about strength and rigidity.
It would be better to have a second bashguard that would fit onto the inner chainring boltholes.
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