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ROTOR Bikes Releases New Stiffer 91-Gram SL2 XC Stem

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ROTOR Bikes has unveiled the latest evolution of it’s super-light SL XC mountain bike stem. While the previous SL weighed in at a scant 83 grams, the new SL2 promises massive gains in rigidity with a new conical stem body in exchange for a stem that is a few grams heavier.

Also new is a completely redesigned stress-reducing steerer tube clamp that cinches down with only one over sized Double Thread Technology bolt & insert, a proven ROTOR exclusive technology. This new single DTT bolt has a replaceable threaded aluminum insert on one side, that works as an intentional failure point to prevent damage to the stem in case of over tightening or a crash. The single DTT bolt spreads the clamping forces more evenly than two standard bolts, while reducing the need for additional reinforcement in the clamp.

The clamp is naturally a carbon-friendly design specifically made for use with lightweight carbon fiber steerer tubes. Even at 91 grams,  the new SL2 has earned and surpassed the highly prized EN14766 certification for stress and fatigue testing from the German EFBe Laboratory.

UPDATED: MSRP is $200.

Click through for more pictures and full specs!


  • Weight: 91 g. for 90mm, 102 g. for 120mm (+-3%).
  • Sizes: 90/105/120mm.
  • Angle: 6 degree
  • Only for use with 25,4mm XC handlebars. Not for use with road bars.
  • Only available in black.


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