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Thomson Elite X4 MTB Stem Black
Thomson Elite X4 MTB Stem Silver
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Thomson Elite X4 MTB Stem Black
Thomson Elite X4 MTB Stem Silver

Elite X4 MTB Stem

Mfg PartNum:
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Built & Tested To The Same Standards As Thomson Aerospace Components

The Thomson Elite X4 is quite possibly the perfect mountain bike stem. The X4 is an iconic balance of strength, precision and design. Ridden by top enduro, downhill and cross-country riders Anyone can run the X4 confidently, it is also light enough for drop bar gravel, adventure rigs, cyclocross bikes and even track racing where front-end stability is paramount.

X4 stems offer precise steering, tracking, and more control while riding, all wrapped up in a beautiful design. The construction features smooth edges for carbon bar compatibility and uses bolts that are custom heat treated with corrosion preventative plating.

The Elite X4 line a forged AL7050 body with a 100% CNC machined surface. The faceplate is forged from AL6066 and is also 100% machined in the USA.

Pair with Thomson's Elite or Masterpiece series posts, seatpost collar and bars for an entire matched suite.


  • Manufactured in the USA
  • Iconic Thomson engineering and design
  • Durable 3mm bolts and precision matching faceplate
  • 40-60mm lengths come in the block style for stiff, precise handling
  • Available in black or silver finish
  • 1 1/8" steer tube diameter
  • 31.8mm bar clamp diameter
  • 0 deg rise
  • Available in 40mm and 50mm lengths
  • Weight: 147g (70mm)

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

40mm - Black

Stem Angle: 0 degree

Stem Clamp Diameter: 31.8 mm

Stem Length: 40 mm

Mfg PartNum: SM-E174-BK 

40mm - Silver

Mfg PartNum: SM-E174-SL 

Stem Angle: 0 degree

Stem Clamp Diameter: 31.8 mm

Stem Length: 40 mm

50mm - Black

Stem Angle: 0 degree

Stem Clamp Diameter: 31.8 mm

Stem Length: 50 mm

Mfg PartNum: SM-E130-BK 

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