When stiffness and weight are the top on your list, you want Ritchey's Carbon Matrix C-260 Stem. The C-260 is 3D forged from 7050 aluminum with a carbon exoskeleton to enhance rigidity. Even the steel M4 bolts shave a few grams with no sacrifice in strength. This revolutionary design starts with a bar clamp that wraps a full 260-degrees around the handlebar to distribute clamping stress evenly through the handlebar, faceplate, hardware and stem body. The steer tube clamp uses three bolts and a curved slot to reduce clamp stress on the steer tube, so you can run carbon bars and a carbon steerer with no problem.
Stem angle is one of the factors that determines handlebar height. A listed angle of 0 degrees actually provides a rise that is dependent on your bike’s head angle (see image).
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 135mm, it actually extends 108mm parallel to the ground.
Installing the stem
|31.8mm / Black / 80mm / 6° / 1-1/8-inch||796941314374||31056117002||210000023630|