Pro Tharsis XC Di2 Compatible Stem (120mm)

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This product was added to our catalog on March 30, 2016.

The Pro Tharsis XC Stem is a total stem system with no star nut or head tube expander needed. Built to allow full integration of Di2 E-tube wiring when used with a Tharsis Di2 Compatible Handlebar. Named after the 15km-high volcanoes of Mars, Tharsis is synonymous with long days in the mountains and the spirit of discovery and adventure. Tharsis components have the strength to tackle the most rugged terrain while retaining low weight because you have to ride up the mountain before you can come back down. We offer the Tharsis line-up in high-strength aluminum alloy which has a distinctive and stylish graphical treatment so that Tharsis parts look as good as they perform.


  • Tharsis XC Stem
  • 80/31.8mm/-6 deg angle
  • Headlock system
  • Headset adjuster
  • Di2 cable integration
  • Titanium bolts
  • Includes cable and topcover
  • This is a total system--no starnut or expander needed
  • Color: Black
  • Avg Weight: 145g