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Old 11-18-09 | 08:10 AM
  #15  
a_thomasmr23
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Joined: Oct 2009
Posts: 131
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From: Pennsville NJ
http://www.rouesartisanales.over-blo...-15505311.html

38mm is concider the thresh hold for aero but I think there is a better weight aero trade off in the 25-30 range but I do not ride any where near 50 km/h, more like 30 for me.
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