Originally Posted by
urbanknight
+1 That's what I have. 50/34 with an 11-28 cassette, and it gets my weakling knees up 18% grades.
To go easier, you need to get a mountainbike cassette (not possible with 10 speed) or switch to a triple.
11-28? With which RD? Do you think a Tiagra will handle it? I have a 11-26 [with 50/34], and struggle with long, steep hills - will switching to a 28 make ANY appreciable difference?