Originally Posted by
BluesDawg
I'm running a 12-30 Tiagra 10 speed cassette on my Roubaix now. Although the Ultegra RD is only rated for up to 28 teeth, it works flawlessly with no adjustments needed. The extra two teeth give just that little extra I had been wishing for on my steepest climbs and I don't miss the 11 at all.
Did you run a longer chain than with the 11-28? I am thinking ahead for the Ride the Rockies. I am not a Mountain Goat like jppe; so, I may do better with a 32 sprocket. I think I can make it with 28, but I may get less fatigued with a 32. My bicycle is the same model as yours but a year older. I did upgrade to Di2. I really like the 11-28; so I may take an extra wheel with a Tiagra 12-32 with me.