sd5782 

I knew there would be some alternative views here. I will look into that other gear calculator that willi88 posted about. I didn't want to spend a ton of money, so hoping to just replace one sprocket which limits me already with the more uncommon 144bdc. I certainly don't want to get rid of the stock Superbe crank either. Perhaps as Road Fan says the 45-48 might be a compromise. Wheel at shop now getting redished for the 7 speed, so after that I will ride it a bit with the 42, and see how much I need that vs a 45. My half step Frejus is 47-50 which is pretty tall, but I really don't want to part with that original setup either. I am thinking that as I get older I will probably not want the 45 small ring.

So, anyhow with both those calculators a 44 big looks nearly perfect as far as gear spacing with just one sprocket change but maxing out at low 20mph. What is wrong with this setup, especially as I get older?

Edit: Actually, looking over the gaps again the 45T has closer spacing at the upper ranges for me. I guess the wider gaps at lower speeds is not such a concern compared to higher speeds. (for an old guy)