Bontrager's quality manufacturing and attention to detail are showcased in the Race ATB Stem. The 3D-forged aluminum construction offers excellent lightness, strength, durability and great looks. Plus, the handlebar clamp's faceplate can be removed, which speeds and simplifies bar installation.
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.