So as the title says I switched to a 165mm crank on my new Speed Concept. I went from a 175mm crank on my 2011 Speed Concept. I am riding a Shimano Ultegra DI2 6800 53/39 crank. After riding for the past 2 months, I have noticed that I am having a hard time finding the correct gear for my preferred cadence while riding on the flats or downhills. I have noticed on downhills that I am looking for an extra cog (Spinning at over 110 cadence) but I am already in the 11 cog. I was assuming that this was due to switching to the 165mm crank. I am currently running an 11-28 cassette, but am wondering if switching to an 11-25 or 23 (have the 23 already on my disc) will help me on the flats at least due to the 16t cog, but I know that won't help on the downhills. I was thinking about going to a 54t chainring, but was not sure if a dura-ace 54t ring would work on an ultegra crank (assume it will since they are both on the 110mm bolt pattern and 4 arms). Advice? Thanks in advance.
Jimmy
Jimmy