Right now, your 48 x 34 low gear works out to 26.?". Pretty standard for a folder. My folder has a 53 x 32 low which is higher than usual. The 11 - 25 x anything is a bad idea though IMO. With a 44T up front your low combination, 44 x 25, becomes 32" which is about where mine is. But your top gear will be 'only' 73". Mine is just over 80". It takes a 36T to get your low to where it is now and then your top gear drops to 60". I wouldn't do it.