Ok, so gear inch equations confuse me, so I'll just tell u good folks what I have on my folder now, and what I'm thinking of doing if feasible. My front ring is a 48. Largest rear gear is 34, 8 speed cassette. I have a ten speed 11-25 I'm itching to put on, as I have a 10 speed shifter also. I know I have to change the chain. What size front ring would I need to put on to get about the same feel/ ratio as the 48-34 combo. I have a 44 teeth but I'm thinking it probably needs to be even smaller since the largest rear is only 25. Any ideas ? Thanks