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Chains? Where we're gonig we don't need chains!
http://farm3.static.flickr.com/2352/2177073031_282845ed68.jpg
This is the Nulla Chainless bike concept:
http://www.cicle.org/cicle_content/pivot/entry.php?id=2007
Pretty weird, eh?
Looks cool but presumbly incredibly expensive and do bike chains really account for enough grief to go to this design?