The Tangeseiki Technoglide ZS225X Zero-Stack Headset is engineered for modern frames using a 44mm straight head tube and a tapered fork interface. It delivers smooth steering performance with a focus on durability, precision and long-term reliability.

Precision Alloy Construction: Built from lightweight yet strong duraluminum alloy, the headset maintains structural integrity while keeping overall weight low. The CNC-machined components ensure accurate tolerances for consistent fit and stable handling.

Sealed Bearing System: The upper unit uses a Tangeseiki original-sized 4TS sealed cartridge bearing, while the lower unit features a dedicated 1.5-inch cartridge bearing. The fully sealed mechanism protects against dirt, moisture and contamination in varied riding conditions.

Frame and Fork Compatibility: Designed specifically for ZS44 upper and EC44 lower standards, this headset supports a 1-1/8" to 1.5" tapered fork configuration. It is well suited for road, gravel and endurance frames using a 44mm head tube.

With its smooth bearing action and robust construction, the ZS225X offers confident, precise steering and dependable performance for everyday riding and long-term use.

Features

• ZS44 to EC44 Tapered Design: Designed for 44 mm straight head tubes with a 1-1/8" to 1.5" tapered fork for modern frame compatibility.
• Precision Duraluminum Construction: Lightweight yet strong duraluminum alloy body is CNC machined for accurate fit and stable steering.
• Dual Sealed Bearing System: Upper 4TS sealed cartridge bearing and lower 1.5" cartridge bearing ensure smooth, consistent rotation.
• Fully Sealed Protection: Sealed mechanism blocks dust, water and contaminants for long-term reliability in varied riding conditions.
• Balanced Ride Performance: Delivers precise handling and dependable durability for everyday road, gravel and endurance riding.

Specifications

• Model: TGZS225X
• Product Type: Zero-Stack Headset
• Intended Use: Road, Gravel, Endurance Bicycles
• Headset Type: Threadless
• Upper Bearing: Sealed Cartridge Bearing (4TS)
• Lower Bearing: Sealed Cartridge Bearing (1.5")
• Configuration: 1-1/8" to 1.5" Tapered
• S.H.I.S Upper: ZS44 / 28.6
• S.H.I.S Lower: EC44 / 40
• Steerer Size: 1-1/8" / 1.5"
• Material: Duraluminum Alloy
• Stack Height: 20.1 mm
• L1 (Upper Stack): 6.5 mm
• L2 (Lower Stack): 13.6 mm
• Weight: 109.5 g