I run 82.9 gear inches. 52 to 17, 170mm cranks and 27x1.25 tires. Everywhere I need to go is level with where I live so it makes a really fast commuter/errands bike. Running this high of gear inches makes slowing down a little more work because you typically go faster and also it takes more back pressure to slow down. Also, as Motopecane mentioned if you have a lot of hills you'll wanna go with something smaller.