Features1HIGH STRENGTH ALUMINUM ALLOY MATERIAL: The shell of this headset is made of aluminum alloy, which not only reduces the burden of the body by lightweight design, but also ensures the stability and durability of long term use, and is reliable and fearless of the severe impact in the rapid downhill riding 2ACCURATE CNC CUTTING PROCESS: Through advanced computer numerical control technology for cutting processing, each edge, aperture are up to micron accuracy, to ensure the great fit of the headset and the front fork, improve the convenience of assembly and the overall coordination of the ride 3CLOSED DOUBLE BEARING DESIGN: High accuracy double row ball bearing is built into downhill headset, and the double sealed structure effectively prevents water and dusts intrusion, maintaining low resistant and high efficiency even in harsh environments, providing sensitive feedback for rapid descent control and flexible rotation 4SUPER SMOOTH AND QUIET EXPERIENCE: The specially lubricated bearing, combined with the accurate bearing structure, makes the steering action silky smooth, almost silent running characteristics, so that every ride is immersed in pure speed and passion, without noise interference 5WIDE COMPATIBILITY: Designed for mountain bikes with 44-49.7mm application range and 28.6mm straight tube specifications, meet the diverse front fork assembly needs of entry level to professional DH speeddown models, easily upgrading your riding equipment and delivering performanceSpecificationItem Type: Downhill HeadsetMaterial: Aluminum alloyApplication Range: Approx. 44 ~ 49.7mm / 1.73 ~ 1.96inStraight Tube Specifications: Approx. 28.6mm / 1.13inPackage List1 xDownhill Headset