Box One Os 31.8 Cromo 5.5" Handlebar

Box One OS 31.8 Cromo 5.5" Handlebar

Product Overview

The Box One OS 5.5" is a compact chromoly handlebar built with Oversized Technology for maximum stiffness in a lower-rise format. Constructed from 4130 chromoly steel using extruded and mandrel-formed methods, it delivers responsive steering control and pedaling platform for riders who prefer reduced handlebar height without sacrificing durability.

Key Features

• Oversized Technology — Strategic variation in wall thickness and tube diameter concentrates material in high-stress zones, optimizing stiffness-to-weight ratio
• 4130 Chromoly Steel — Premium handlebar material offering superior strength and impact resistance compared to alternatives
• 13 Butted Construction — Variable wall thickness minimizes weight while maintaining structural rigidity where needed most
• Massive Clamp Interface — 31.8mm clamp diameter provides maximum contact surface with stem for locked-in steering precision and zero flex
• Compact Geometry — 5.5" rise with 7° back sweep and 2° up sweep creates a lower, more aggressive riding position ideal for technical maneuvers

Technical Specifications

• Material: 4130 Chromoly Steel
• Construction: Extruded and Mandrel Formed with 13 Butted walls
• Bar Bore (Grip Area): 22.2mm
• Clamp Diameter: 31.8mm
• Height: 5.5" (139.7mm)
• Width: 28.25" (717.5mm)
• Sweep Angle: 7° back, 2° up
• Weight: 898g
• Finish Options: Gloss Black or Chrome with pad printing

Compatibility and Ideal Use Cases

Compatible with any 31.8mm clamp stem. The lower 5.5" rise suits riders preferring compact bar heights for street and park riding, technical tricks, and aggressive trick progression. Works well for riders transitioning to smaller bars or those seeking enhanced leverage for manuals and nose manuals.