Box One Center Clamp Stem (1 1/8" 31.8mm)

The Box One 31.8 Center Clamp Stem is made of 6061-T6 aluminum and features an open design, reducing weight while maintaining strength. Available in 53mm and 60mm extensions.

• The stem is claimed to be the lightest in its category.
• It reduces the risk of knee injury by eliminating rear pinch bolts.
• It requires at least 40mm of exposed steerer tube for proper clamping.