Cycling Tips: 23mm VS 25mm VS 28mm What is Best?? Posted on 17/02/2014 by Eric Thompson learn more [tubepress video=”8OCzCqciqxQ” title=”false” length=”true” description=”true” descriptionLimit=”0″] Views: 1 See also First Look: Shimano Di2 Dura-Ace and Ultegra groupsets - the end of mechanical Ultegra