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Box One Oversized Delta Stem (1 1/8" 31.8mm)

Box One Oversized Delta Stem (1 1/8" 31.8mm)

Regular price $96.99
Regular price Sale price $96.99
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Size & Color


  • Oversized
  • 45 Degree Load Clamp Design with Side Skirts for Rigidity
  • Two-Tone Anodizing
  • Massive Bar Bore
  • Massive Clamping Bolts
  • Superior Strength


  • Material: 6061-T6 Aluminum
  • Process: Forged & CNC
  • Hardware: Chromoly Clamping Bolts
  • Finish: Anodized w/Laser-Etched Graphics
  • Length: 48mm, 53mm
  • Clamp Diameter: 31.8mm
  • Stack Height: 32mm
  • Rise: 0˚
  • Steerer Tube: 1-⅛”
  • Weight: · 48mm: 290 g / 10.2 oz - · 53mm: 299 g / 10.5 oz


Meets or exceeds EN 16054 Category 2 Standard.

All Box stems are engineered & crafted using our Oversized Technology. As we follow the load paths down the handlebars we have focused our attention on the stem-to-bar interface. Since the Oversized handlebars have an increased wall thickness & tube diameter in this sector we have reciprocated with an augmented stem interface w/ greater surface area. We’ve done this by moving material from low stress areas. This has greatly minimized twist & contributed to responsiveness. As the stem is mated w/ the handlebars we have contributed to increased pedaling stiffness by providing a backstop to the “lifting” phenomenon. There is no point pushing hard on your pedals if you can’t pull up on your handlebars & deliver that power. Power can easily be lost to handlebar-to-stem deflection & the consequences can be poor power delivery & steering control. When combined w/ Box’s other Oversized components, you’ll experience heightened responsiveness & reduced latency.

Key differences: This particular model stem not only shifts material from low stress zones to the Oversized interface, but also provides rigidity through the side skirt design. We used a reverse development process for the delta stem. The structure was created from the outside-in vs. the traditional inside-out method. These stems are engineered for the larger-sized racers.

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