I think a lot depends on the type of riding you do and how you like to ride. I have a pretty small triple with a 24 on the front and I go up to a 28 on the back. But I don't like to stand on long climbs and I can stay in the saddle on an 18% grade and just spin away with that. I like to do long rides with lots of climbing and this set up works for me. It's better for my knees too.
My big ring is only a 48, but I can go plenty fast enough. I've pushed the bike up to 32 MPH on a slight downhill with a tailwind. On the flat I typically average around 18 but there's not much flat around here without a wind in one direction or the other or hills so my rides tend to average out around 15 mph give or take a half a mile. I almost never use the 48 and my 12 together. I like to spin and just can't push those gears fast enough to feel comfortable under most circumstances.
So what kind of riding are you doing? What are you hoping to gain from changing your set up?
Veronica



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). I can get away with that since I'm friction shifting the front derailer.
