I hope I'm not kicking a dead horse here but I just wanted to hear from some of you guys running the 15/50 sprockets. I'll be doing mostly gravel road riding and mild trails with some hills (no mountains) but on the pavement I would like to run 100kph (60mph) . Just wanted to know what kinds of gains/losses you experience with this set up? Btw I'm 5'11" 225lbs. So she'll be workin'!