I am currently running a 50/34 chain set with an 11/34 cassette on my road bike and really like the extra range of the bigger cassette. I don’t often need the 34t cog in the back but when I do it’s much appreciated. My only issue with the setup is the larger jump between cogs. I just recently saw that Cannondale and FSA make a replacement spider and rings that can be used on my existing Cannondale SI crank to change out to sub compact 48T / 32T or 46T / 30T gearing. I’m considering getting the 48T / 32T combo and then switching my rear cassette back to something with smaller jumps that will also give me a similar low end to match my current setup. I don’t race, and almost never use the 50T / 11T combo on my current set up. I don’t think I would be loosing much too end speed if I did start using a 48T / 11T combo.
Anyone see any downside to this setup that I’m missing?