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G2, 31.8mm Road & Gravel Stems

Price range: $151.95 through $165.95

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The Thomson G2 stem is a complete structural redesign of our popular X2 road stem. The G2 is stronger in all the right spots, without adding bulk. Machined from a single block of 7000 series aluminum, the G2 is lightweight and solid for any riding style — from fast road bikes to all-day gravel machines.

Pair it with some Thomson bars for the entire cockpit collection.

Description


Thomson and stems go hand in hand, and the G2 upholds that legacy of Thomson excellence. Precision-machined in our Macon, Georgia facility, the G2 is crafted with the same care and rigorous testing as our aerospace components. Built to be stronger and more robust than its predecessors, the G2 is designed to handle the toughest conditions while offering the lightweight performance cyclists demand. Whether you’re riding gravel, on the road, or in the velodrome the G2 and its two bolt design are not going to disappoint.

Available from 70mm – 130mm in a 10° angle

  • Thomson CNC classic feed lines
  • Titanium 4mm bolts for the steerer,
  • .Titanium T-25 bolts for the faceplate
  • Precise steering and tracking for the ultimate control while riding
  • Low 36mm stack height from the top to the bottom of the stem steerer.
  • USA made in Macon Georgia!
  • See our warranty information here.

See the G2 in action and on an adventure below! 🙂

 

Smarter Stem Lengths for a Better Fit

Dialed Geometry

With six stem lengths and a 10° angle that can be flipped for a lower or higher handlebar position, the G2 stem lets you fine-tune your riding position for comfort, performance, and control.

Lighter Bolts, Solid Clamping

Titanium Hardware

The G2 features titanium stem bolts at both the handlebar clamp and steerer tube. Larger hex and Torx heads make adjustments easy while reducing the chance of stripped bolts.

Precision-Built from One Piece of Aluminum

CNC Machined in the USA

Every G2 stem starts as a single block of aerospace-grade 7000 series aluminum. It’s machined in our Georgia facility with the same care we put into aircraft parts.

Gravel-Ready Without the Bulk

Lightweight & Strong

The G2’s updated design boosts strength around stress points while keeping weight low. A 110mm stem weighs around 150 grams — stiff enough for punchy climbs, light enough for race day.

2-Bolt Faceplate with Aero Bar Compatibility

Clean Setup, Minimal Look

The slim faceplate and narrow clamp width make the G2 a great fit for clip-on aero bars or accessories. Fewer bolts. More simplicity. Zero distractions.

Downloads

2 bikes against a pink wall

Road and Gravel Bike Stems Built to Ride Hard

This is the bike stem you’ll want when control, comfort, and setup options matter across long miles and mixed terrain.

Build Your Dream Bike

Seatposts

Dial in your saddle height and weight distribution with trusted Thomson quality.

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Handlebars

Whether you’re chasing podiums or dirt roads, our bars match your riding style.

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Small Parts & Hardware

Spare stem bolts, faceplates, and everything you need to keep riding.

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FAQ

About Bike Thomson

Thomson started in aerospace, and we’ve kept that same focus on precision since the beginning. Based in Macon, Georgia, we machine every stem, seatpost, and component in-house from top-grade materials. That means full control over quality, from raw aluminum to final product. Riders trust because our parts show up, ride after ride, year after year. Whether you’re tuning your fit, switching up your frame, or chasing a new PR, we build components that do the job quietly, confidently, and for a long time.