The Thomson X4 Stem is stronger and lighter than their older Elite stem. A good part of this weight savings comes from the change in design. Where the Elite used an internal wedge clamp, this X4 relies on a more traditional ...

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Product Review

The Thomson X4 Stem is stronger and lighter than their older Elite stem. A good part of this weight savings comes from the change in design. Where the Elite used an internal wedge clamp, this X4 relies on a more traditional split clamp for the steerer interface. While it meant losing the knee-saving shape on the Elite, the clamp bolts are pretty minimal given the sculpted design. The Thomson X4 Stem is CNC machined from 7000 series aluminum alloy. It has a 31.8mm clamp diameter. It's available in Black or Silver and with a zero (90) or ten (100) degree rise.

Product Features

  • Material: 7000-series aluminum
  • Bar Diameter: 31.8 mm
  • Steer Tube Diameter: 1.125 in
  • Length: 50 mm, 70 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm
  • Rise: 0 deg, 10 deg
  • Bar Attachment: 4-bolt
  • Weight: 174 g
  • Recommended Use: XC, freeride
  • Manufacturer Warranty: 3 years


  • Thomson Elite X4 A-Head Stem Black
  • 1-1/8 inch x 10 ° x 130 mm x 31.8 mm handlebar.
  • SM-E142 black.

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