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About This Product

The Box Two Box Two Center Clamp Stem Stem is cold forged from the highest quality 6061-T6 aluminum available. Featuring an open skeletal design and a dual mid-bolt wedge mounting system, they are lightweight yet maintain a very high level of strength. A 53-millimeter extension stem weighs just 218 grams/7.7 ounces. By removing the rear pinch bolts and moving the mounting bolts to the middle of the stem, we reduced the weight and size and eliminated a serious hazard to the rider’s knees.

These stems come with either a 48- or 53-millimeter extension and a 5-degree rise or drop. To ensure proper clamping force, the stem must be mounted on a fork with at least 40 millimeters of exposed steerer tube. Not compatible with forks that have carbon fiber steerer tubes.  
  48mm 53mm
Clamp 22.2mm 22.2mm
Hardware Chromoly Chromoly
Material 6061-T6 Aluminum 6061-T6 Aluminum
Other Laser-etched graphics Laser-etched graphics
Rise
Steerer Tube 1 1/8" 1 1/8"
Weight 213 grams / 7.5 ounces 218 grams / 7.7 ounces

 

Meets or exceeds ENBMX Category 1 standards