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BOX Hex Lab Oversized Front Load Stem

BOX Hex Lab Oversized Front Load Stem
  • Color: Blue
  • Color: Black
  • Color: Red
Clamp Diameter:
Steerer Diameter:
Please select options


All Box stems are engineered and 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 and tube diameter in this sector we have reciprocated with an augmented stem interface with greater surface area. We’ve done this by moving material from low stress areas. This has greatly minimized twist and contributed to responsiveness. As the stem in mated with 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 and deliver that power. Power can easily be lost to handlebar-to-stem deflection and the consequences can be poor power delivery and steering control. When combined with Box’s other Oversized components, you’ll experience heightened responsiveness and reduced latency.

Key differences: This particular model stem pushes our Oversized Technology to the extreme as it maximizes the shift of material from low stress zones to the Oversized interface. These stems are engineered for the smaller-sized racers.

-Lightweight 3D Hollow Design
-Front-Load Clamp Design to Fight Pull-Up Forces
-Large Bar Bore
-Large Hollow Clamping Bolts
-Superior Strength

Part Numbers

Option UPC MPN Store SKU
28.6mm / Blue / 40mm / 5° / 1-inch 639266092186 BX-ST16CSPM0-BL
28.6mm / Blue / 45mm / 5° / 1-inch 639266092223 BX-ST16CSPM5-BL
28.6mm / Black / 40mm / 5° / 1-inch 639266092179 BX-ST16CSPM0-BK 210000075409
28.6mm / Black / 45mm / 5° / 1-inch 639266092216 BX-ST16CSPM5-BK
28.6mm / Red / 40mm / 5° / 1-inch 639266092209 BX-ST16CSPM0-RD
28.6mm / Red / 45mm / 5° / 1-inch 639266092247 BX-ST16CSPM5-RD