36x15 gears, running 26x1.75 Forte' Gothams, gives me roughly 61 gear inches. I'm spun out at a MUP friendly 17-19mph, but can maintain 16mph all day long. That chainring and crank are the original Suntour XCpro without the other two chainrings. On some of the local single tracks, I have an 18t cog to make short, steep assents in the dirt a little easier, but as it is, I can climb just about any paved hill I am likely to encounter.