you have tiagra like me. I don't know your gearing mine is 50/34 12-25 but this is what it do and it works. tiagra allow you to down shift three cogs at a time, so when going from small to big i simultaneous shift up to big and up three in the back, and it gets me to a close cadence. the trickier part is going from big to small, i shift front and back at the same time but the right shifter i have to tap it three times rapidly. i usually over tap or under tap, one day i will have it perfect.