I'm debating to make some changes in my cassette/chainrings. Right now I have 53/42 crank with 8 speed 12-23 cassette, thinking of at least going 12-25 and possibly change the 42 to 39. This is on mid 90's 105 components. I do ok with what I have now, but there are some times when 42/23 is too much of a grind. On the other hand, I find the 42 to be a very good general purpose ring, I actually do a lot of riding on it, but it would be nice to have a little more differentiation between the two chainrings. Anyway, no real question here, just thinking out loud (and I actually think I may have posted something like this in the past).