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Item # THP000A

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  • Black, 0Deg/100mm ($99.95)
  • Black, 0Deg/110mm ($99.95)
  • Black, 0Deg/120mm ($99.95)
  • Black, 0Deg/130mm ($99.95)
  • Black, 0Deg/50mm ($99.95)
  • Black, 0Deg/70mm ($99.95)
  • Black, 0Deg/90mm ($99.95)
  • Black, 10Deg/100mm ($99.95)
  • Black, 10Deg/110mm ($99.95)
  • Black, 10Deg/120mm ($99.95)
  • Black, 10Deg/130mm ($99.95)
  • Black, 10Deg/90mm ($99.95)
  • Silver, 0Deg/100mm ($99.95)
  • Silver, 0Deg/110mm ($99.95)
  • Silver, 0Deg/120mm ($99.95)
  • Silver, 0Deg/130mm ($99.95)
  • Silver, 0Deg/50mm ($99.95)
  • Silver, 0Deg/70mm ($99.95)
  • Silver, 0Deg/90mm ($99.95)
  • Silver, 10Deg/100mm ($99.95)
  • Silver, 10Deg/110mm ($99.95)
  • Silver, 10Deg/120mm ($99.95)
  • Silver, 10Deg/130mm ($99.95)
  • Silver, 10Deg/90mm ($99.95)
  • Black, 0Deg/40mm ($99.95)
  • Black, 0Deg/60mm ($99.95)
  • Black, 0Deg/80mm ($99.95)
  • Black, 10Deg/80mm ($99.95)
  • Silver, 0Deg/40mm ($99.95)
  • Silver, 0Deg/60mm ($99.95)
  • Silver, 0Deg/80mm ($99.95)
  • Silver, 10Deg/80mm ($99.95)
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Item # THP000A


The Thomson X4 Stem utilizes a more traditional split clamp design to save weight without sacrificing stability and control. The X4 features a sculpted stem, sleek clamp bolts, and is made with 7000-series aluminum alloy to ensure torsional stiffness and precise steering. The X4 Stem comes with a 3-year warranty from the manufacturer. The stem is available in Black or Silver with a zero (90) or 10-degree (100) rise.

  • 7000-series aluminum
  • Sculpted stem and sleek clamp bolts
  • Split clamp design
  • 31.8mm clamp diameter

Tech Specs

50 mm 70 mm, 90 mm 100 mm, 110 mm 120 mm, 130 mm
10 deg, 0 deg
Clamp Diameter:
31.8 mm
Steer Tube Diameter:
1.125 in
Bar Attachment:
4-bolt faceplate
Claimed Weight:
[0-deg/50mm] 167 g
Recommended Use:
cross country, freeride
Manufacturer Warranty:
3 years

Reviews & Community

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Thomson X4 Stem

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Here's what others have to say...

5 5

No surprise here

  • Familiarity: I've put it through the wringer

Excellent as usual from Thomson... All my bikes have Thomson Post and Stem..

Works great for a road bike too!

To get my desired drop, I needed a zero rise stem, and Thomson fit the bill. There aren't many zero stems out there.

Works great for a road bike too!
4 5

Solid, expensive for weight

  • Familiarity: I've used it several times

Thomson x4 stem is very solid, great materials, great construction, looks good, and has +/-10 which fit my needs perfectly. my only gripe would be that the stem is a little on the heavy side given the price point. there are many alternatives to the Thomson x4 stem that cost 1/2 the price and accomplish the same task, so you are definitely paying extra for the Thomson brand. most of the time I would be bothered by that, but not as much here, given that this stem definitely delivers on its quality focus and offers the steeper angle (-10) that many others don't.

Solid, expensive for weight
5 5


  • Familiarity: I've put it through the wringer

Thomson, made in the good ol' US of A. Over the years I've had everything from a 50mm up to a 120mm on my rides. They are so good, I just can't seem to quit them.