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2009 CrossVegas: The Shimano Dura-Ace 7900 46-tooth chain ring is actually a handmade prototype.

2009 CrossVegas: The Shimano Dura-Ace 7900 46-tooth chain ring is actually a handmade prototype.  |  Photo: Matt Pacocha
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2009 CrossVegas: The Shimano Dura-Ace 7900 46-tooth chain ring is actually a handmade prototype.
2009 CrossVegas: The Shimano Dura-Ace 7900 46-tooth chain ring is actually a handmade prototype.  |  Photo: Matt Pacocha
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