or tarckeemoon, depending
Join Date: Dec 2005
Location: the pesto of cities
Bikes: Davidson Impulse, Merckx Titanium AX, Bruce Gordon Rock & Road, Cross Check custom build, On-One Il Pomino, Shawver Cycles cross, Zion 737, Mercian Vincitore, Brompton S1L, Charge Juicer
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By their own admission it may not be more efficient compared to a well-maintained chain system and they offer no science to support their claim so the numbers are meaningless anyway.
If your drivetrain parts break or wear out, can they supply them quickly? How much are the parts? E-mail them or call their 800 number and see how long it takes to get someone who can actually answer these questions.
I can't knock the ride of bike because I've never ridden one, but chains are easy to come by, and so are pants.