Tange-Seiki

Terious DX4 Headset - EC34/28.6 Upper, EC34/30 Lower, Straight

The Tange-Seiki Terious DX4 Headset delivers smooth, reliable steering performance for riders who value precision and durability. Built from lightweight Dulaluminum alloy, it strikes an ideal balance between strength and weight savings, making it a smart upgrade for road, gravel, or commuting builds.

With fully sealed #800 upper and lower bearings, the Terious DX4 keeps out dirt and moisture for longer service life and consistent performance in all conditions. Its straightforward EC34 design fits 34mm straight head tubes and 1-1/8 inch straight steerer forks, providing a solid, low-maintenance solution for classic setups.

• Dulaluminum construction offers a strong, lightweight build for dependable performance
• Fully sealed bearings protect against contaminants and extend headset life
• 13.9mm upper and 11.6mm lower stack height for a compact total stack of 25.5mm
• Designed for EC34/28.6 upper and EC34/30 lower fitment
• Ideal for riders seeking smooth steering and long-term reliability