2009 Tour Tech, Trek's TT bikes: Armstrong uses Zipp’s Vuka Shift extensions, with a direct shifter mount, saving 45 grams.  |  Photo: Matt Pacocha
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2009 Tour Tech, Trek's TT bikes: Armstrong uses Zipp’s Vuka Shift extensions, with a direct shifter mount, saving 45 grams.
2009 Tour Tech, Trek's TT bikes: Armstrong uses Zipp’s Vuka Shift extensions, with a direct shifter mount, saving 45 grams.  |  Photo: Matt Pacocha
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