Position One External Headset 1-1/8"

Product Overview

The Position One External Headset is a sealed-bearing headset designed for standard 1-1/8" threadless steerer tubes and forks. It features angular contact bearings and CNC-machined aluminum components, offering reliable steering performance and durability at a competitive price point.

Key Features

• Angular Contact Bearings (45° x 45°) - Dual-angle bearing races distribute loads efficiently and reduce friction during steering input; improves handling precision and reduces drag
• Sealed Bearing Cartridges - Labyrinth seals keep contaminants out and grease in; extends bearing life and reduces maintenance intervals compared to cup-and-cone designs
• CNC-Machined Aluminum Cups and Compression Star - Precisely toleranced components ensure consistent bearing preload and eliminate play; aluminum reduces weight without sacrificing stiffness
• Lightweight Design - 112 g total weight minimizes rotating and unsprung mass at the front end
• Standard External Mount - Proven headset architecture compatible with most modern MTB and trail bike frames

Technical Specifications

• Headset Type - External (threaded cup style)
• Steerer Tube Diameter - 1-1/8" standard threadless
• Bearing Configuration - Angular contact 45° x 45°
• Bearing Style - Sealed cartridge
• Cup Sizes - EC34/28.6 (top) | EC34/30 (bottom)
• Materials - Aluminum cups and compression star; steel bearing races
• Weight - 112 g (complete headset)
• Installation - Requires headset press for removal and installation

Compatibility and Ideal Use Cases

• Frame Compatibility - Fits 1-1/8" standard threadless headtubes only; not compatible with integrated or internal headset frames
• Fork Compatibility - Requires 1-1/8" steerer fork
• Ideal For - Trail, XC, and hardtail bikes where reliable steering performance and durability are essential
• Maintenance - Sealed bearings reduce service frequency; inspect for play annually and adjust preload if needed
• Not Compatible With - 1.5" oversized headtubes, tapered headsets, or integrated headset frames