You'll strike like a cobra with Profile's Cobra S Stem! This sweet carbon-wrapped, forged aluminum stem delivers superior strength, excellent vibration damping and low weight. The 4-bolt faceplate is ultra tough and makes handlebar changes a breeze. And, the opposing-bolt steerer clamp is safe and secure.
Stem length is measured along the side of the stem from the center of the steerer to the center of the handlebar clamp (see diagram). Keep in mind that as a stem provides more rise, its effective length decreases. In the example above, if the +17-degree stem measures 135 mm, it actually extends 108 mm parallel to the ground.