We have both the WI and the DF. We are planning on taking the DF on our next 3-4 week tour. Yes, it's heavy and noisy, but the fuel consumption is less with the adjustability.
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Gunnar Sport
Specialized Ruby
Salsa Vaya Ti
Novara Randonee x2
Motobecane Fantom CXX
Jamis Dakar XCR