Box One Carbon Sealed Integrated 1.5" Tapered Headset

Product Overview

The Box One Carbon Sealed Integrated 1.5" Tapered Headset is a sealed system built for tapered steerer tubes with premium bearing and material specifications. Featuring titanium-nitride coated 45×45 bearings, carbon fiber top cover, and an expander plug design, it delivers low friction performance with corrosion resistance. An included adapter allows compatibility with straight 1 1/8-inch steerer tubes.

Key Features

• Titanium-nitride coated bearings — Coating reduces friction coefficient, increases corrosion resistance, and extends bearing life compared to uncoated steel
• 45×45 bearing angle — Geometry optimized for BMX geometry and load angles, providing responsive steering feel and predictable handling
• Sealed bearing cartridges — Protects internal races from moisture, dirt, and salt contamination in varied riding conditions
• Carbon fiber top cover — Reduces weight while providing protection and visual distinction without structural compromise
• CNC-machined alloy top cap — Precision-manufactured with Box logo cutouts for weight reduction and consistent clamping surface
• Expander plug design — Eliminates need for star nut, simplifies installation, and works with all 1 1/8-inch steerer tubes including carbon fiber
• Split crown race — Two-piece design allows tool-free installation and removal from fork crowns without forcing or risk of damage

Technical Specifications

• Bearing type: Sealed, titanium-nitride coated 45×45
• Headset class: Integrated
• Steerer tube: 1 1/8" to 1.5" tapered
• Frame compatibility: IS 42/28.6 (lower) and IS 52/40 (upper) with tapered 1.5" steerer
• Alternative (with adapter): IS 52/30 for straight 1 1/8-inch steerer tubes
• Top cap material: CNC-machined alloy with anodized aluminum bolt
• Expander plug: Gold anodized aluminum
• Top bearing cover: Carbon fiber
• Weight: 107 grams (3.8 oz) standard | 111 grams (3.9 oz) with adapter
• Recommended torque: 9–10 Nm (expander) | 1.5 Nm (top cap)

Compatibility and Ideal Use Cases

Designed for frames and forks with tapered 1.5" steerer tubes (IS 52/40 upper, IS 42/28.6 lower). Standard version fits tapered geometry exclusively. Adapter allows use with straight 1 1/8-inch steerer tubes on compatible frames. Sealed construction makes it ideal for all riding conditions—street, park, and racing environments. Recommended for riders prioritizing smooth steering response, low maintenance, and corrosion resistance.