Old 01-16-20, 06:37 PM
  #4642  
ryan_rides
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Join Date: Jan 2018
Location: South Florida
Posts: 273

Bikes: 2018 Aventon Cordoba 2021 Specialized Allez

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I had to replace my rear cog (15t) with my new dura ace (16t) cog because it was worn out. I had to buy a new chain as well (kmc 410). I HATE 48/16 IT'S SO SLOW It's crazy how big a difference one single tooth in the rear cog makes.
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