Quote Originally Posted by OakLeaf View Post
I'm not sure you'd really want to swap out the single cog. Whatever your jump is now (whether 24 to 28 or 25 to 28), adding two teeth to it would make it an ENORMOUS jump, which not only would be hard on your legs, but your RD as well. I can't imagine smooth shifting over a difference of 5 or 6 teeth, especially downshifting when you're really going to be wanting to preserve momentum. Since you'll have the cassette off anyway, you'll have to have bought both cassettes, and you'll have to adjust the B-screw, what is the advantage to swapping only the cog vs. the whole cassette?
Yup, you're absolutely right OakLeak - excellent point; thanks. I'm learning. It'll be too big of a jump from 24 to 30.

New cassette: 11,12,13,14,15,17,19,21,24,28
Old cassette: 12,13,14,15,17,19,21,24,27,30

Again, the members of this forum make up a wealth of knowledge. Thanks, OakLeaf and Indysteel. I'm going to see how this cassette feels; will let you know how it goes.