with wireless technology here, I wonder how much of the existing RD design can be (re)moved. I am not sure if the next "solution" (aerodynamically) can be a separate purchased item, in my mind you move the necessary mechanics into the chainstay and have not much more than the actual cage/pulleys exposed. Something like a modern version of that S1.
My Blog - http://leegoocrap.blogspot.com
My Blog - http://leegoocrap.blogspot.com
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leegoocrap: Jun 1, 16 4:44