Box Two Integrated 1" Conversion Headset

Product Overview

The Box Two Integrated 1" Conversion headset is a specialized headset designed to allow 1" steerer tube forks to work with 1-1/8" integrated head tube frames. Built with 6061-T6 aluminum components, CNC-machined bearing covers, and precision 45x45° bearings, it delivers smooth steering performance while solving compatibility issues between frame and fork sizes. This conversion headset is essential for riders mixing fork and frame sizes or upgrading to different fork standards.

Key Features

• 1" to 1-1/8" conversion design – Engineered to bridge the gap between 1" steerer tubes and 1-1/8" integrated head tubes, allowing compatibility between different fork and frame generations
• Precision 45x45° bearings – Angled bearing geometry reduces friction and provides smooth, responsive steering feel across the full range of motion
• Split crown race – Two-piece crown race design simplifies installation and ensures proper bearing contact without binding or play
• CNC-machined bearing cover – Precision-cut aluminum cover protects bearings from dirt and debris while maintaining smooth rotation
• 6061-T6 aluminum construction – Lightweight, durable aluminum alloy resists corrosion and maintains structural integrity under repeated steering loads
• Aluminum top cap – Finished top piece secures the upper bearing assembly and integrates with stem clamp systems
• Integrated cup design – Press-fit cups work with integrated head tube frames, eliminating the need for external cup systems
• Lightweight at 97g – Minimal weight addition to your cockpit setup

Technical Specifications

• Headset type: Integrated conversion
• Frame compatibility: 1-1/8" integrated head tubes (SHIS 42/25.4 or IS 42/26.4)
• Fork compatibility: 1" steerer tubes
• Bearing configuration: 45° x 45° precision bearings
• Cup material: 6061-T6 aluminum alloy
• Crown race type: Split design
• Bearing cover: CNC-machined aluminum
• Top cap: Aluminum
• Weight: 97g (3.4 oz)
• Sealed: Closed bearing design protects internal components

Compatibility & Ideal Use Cases

This headset is specifically designed for BMX bikes with 1-1/8" integrated head tubes paired with 1" steerer tube forks. It's ideal for riders upgrading forks across different standard sizes, mixing older 1" forks with newer 1-1/8" frames, or building custom bikes with mismatched fork and frame specifications. The conversion design eliminates the need for spacer-heavy setups or frame modifications. Not compatible with threaded headsets, external cup systems, or non-integrated head tubes. Works with any 1-1/8" integrated head tube frame and standard 1" fork steerer tubes.