The Delta stem is the first, modern, 31.8mm Ø, oversize stem designed specifically for BMX racing. When used with our new Jet, Triple Taper Alloy, or Box One Chromoly (aka Maximus) handlebars, you get the absolute stiffest cockpit available. This added stiffness significantly improves bike handling while putting more upper body power into your pedal stroke, translating into more forward momentum. This isn’t just hype. Every rider we've worked with who has used the Delta/Maximus set-up has noticed a major improvement in stability and control. Delta stem bodies are extruded and CNC-machined from the highest quality 6061-T6 aluminum. The top clamps are cold forged and CNC-machined for increased stiffness and strength. Despite their size and girth, Delta stems weigh less than many standard size 22.2 stems.
The new Box One 31.8mm Center Clamp Stem is the lightest weight oversize BMX stem on the market. Box One stems are 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 and stiffness. By removing the rear pinch bolts and moving the mounting bolts to the middle of the stem, we managed to reduce the weight and size, and eliminated a serious hazard to the rider’s knees. This stem comes with a 53mm or 60mm extension (black only) and a zero degree rise. To ensure proper clamping force, the stem must be mounted on a fork with at least 40 millimeters of exposed steerer tube. Please note, this stem is not compatible with carbon fiber steerer tubes.
Material: 6061-T6 Aluminum
Size: For 1-1/8" steerer tube forks / 53mm long / 0° rise / 44mm stack height / 31.8mm Clamp (Ø)