Box Hex Lab Carbon Handlebar 4.5" 28.6mm OS

Product Overview

The Box Hex Lab Carbon Handlebar is a hand-laid carbon fiber bar designed for younger, lighter-weight riders prioritizing weight reduction and stiffness. The 28.6mm oversized clamp interface delivers exceptional rigidity while the compact 4.5" rise accommodates smaller frame geometries and rider proportions.

Key Features

• Custom Hand-Laid Carbon Fiber Construction - Precision carbon layup optimizes strength-to-weight ratio; reduces rotating mass and handlebar deflection under load
• 28.6mm Oversized Clamp Interface - Proprietary oversized diameter provides exceptional clamping stiffness compared to standard 22.2 mm bars; minimizes flex and improves steering response
• Race-Oriented Design - Engineered for competitive performance; lightweight construction and responsive feel suit riders seeking maximum control and minimal mass
• Compact 4.5" Rise - Low rise accommodates younger or shorter riders; maintains ergonomic hand position without excessive stem extension
• Ergonomic Sweep Geometry - 6° back sweep and 2° up sweep provide natural wrist angle and reduce fatigue during extended riding

Technical Specifications

• Material - Carbon fiber (hand-laid)
• Clamp Diameter - 28.6mm (oversized)
• Height - 4.5" (114.3 mm)
• Width - 23.6"
• Back Sweep - 6°
• Up Sweep - 2°
• Weight - 189 g (6.6 oz)
• Maximum Clamp Torque - 7 Nm
• Maximum Rider Weight - 100 lbs

Compatibility and Ideal Use Cases

• Stem Compatibility - Requires 28.6mm oversized clamp stem only; not compatible with standard 22.2 mm or 31.8 mm stems
• Rider Weight Limit - Engineered and tested for riders up to 100 lbs maximum; exceeding this weight risks bar failure or delamination
• Age/Size Target - Designed for younger riders
• Ideal For - BMX racing, pump tracks, and competitive youth riding where lightweight construction and responsive handling are priorities
• Installation - Apply maximum 7 Nm torque when securing to stem; over-tightening risks cracking carbon fiber or stripping clamp interface
• Maintenance - Inspect regularly for cracks, splinters, or delamination; carbon fiber damage is not repairable and requires bar replacement
• Not Recommended For - Riders exceeding 100 lbs; downhill or gravity-focused riding; adult riders

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