The Box Two Top Load Stem is a modern 1-inch by 22.2mm stem designed specifically for BMX racing. Box Two Top Load stem bodies are cold-forged and CNC-machined from the highest quality 6061-T6 aluminium. The lightweight front clamps are cold-forged and CNC-machined for increased stiffness and strength. The top load stem is designed for easy of handlebar installation while maintaining superior strength.