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Ritchey WCS Carbon Matrix 4Axis Stem

Ritchey WCS Carbon Matrix 4Axis Stem
  • Color: 3k Weave
  • Color: UD Weave
Clamp Diameter:
3k Weave
Steerer Diameter:
Please select options
This item may not be shipped, however it can be purchased online and picked up at your convenience.


Ritchey's WCS Carbon Matrix 4Axis Stem combines the best properties of aluminum and carbon by joining the two! The 4Axis stem features a carbon exterior with a 3D-forged 2014-aluminum core for super lightness and more strength than pure aluminum. Plus, this sweet stem offer fatigue resistance considerably better than offered by carbon only. You also get Ritchey's secure Bias Clamp, and a 4-bolt faceplate with titanium bolts for even more weight savings.

By placing the stem clamp slot at an angle and using opposing bolts, stress is distributed evenly across the clamping zone, resulting in a stronger, more secure grip with less torque. This makes Ritchey stems a great choice for use with forks with carbon steerers.
Stem angle and length measurement

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.

Part Numbers

Option UPC MPN Store SKU
31.8mm / 3k Weave / 120mm / 6° / 1-1/8-inch 796941314060 31-367-360 210000023873
31.8mm / 3k Weave / 130mm / 6° / 1-1/8-inch 796941314077 31-367-361 210000023874