Originally Posted by
volosong
If I may ask . . . what chain are you using, and what cassette? (which level component group) Does the LX RD work seamlessly with STI 10-speed shifters, (105 - Ultegra - Dura-Ace)?
There is a particularly steep hill I want to assault this year, and a 34-34 would sure make it much more possible to defeat.
I own a bike with the same set up exactly that Gfish has. Compact 50-34 double 105 group, 10 speed, LX rear derailleur. 11-34 cassette.
It works well. Bigger jumps in the bigger cogs, but not bad in the middle and small cogs. I still prefer my 9 speed 11-28 cassette triple. Some people would not notice or care about the different spacing. Moving at speed on flat ground the compact is fine. But, I like the climbing a lot better with closer low gears from the triple.