Ever wonder if you're riding with the right stem? Want to dial in your bike fit? Salsa's Size-O-Matic II allows you to find your optimal reach and rise for maximum on-bike comfort and performance. It's easily adjusted, and the hinged bar clamp makes swapping bars a cinch. The Size-O-Matic II is for fitting only, it is not for riding.
Stem angle is one of the factors that determines handlebar height. A listed angle of 0 degrees actually provides a rise of 16-20 degrees, depending on the bike's head-tube angle. Flexible, athletic riders prefer lower-rise stems, while recreational riders usually favor higher-rise stems.