Threadless Bicycle Headset, Compatible with Mountain and Road Bikes

【Wide Compatibility】Designed for road and mountain bikes with a 44mm upper and 56mm lower steerer tube. This headset supports both tapered and straight forks, giving riders versatile options to upgrade their everyday setup.
【Water Resistance】Equipped with a waterproof cover that protects the internal bearings from dust and moisture. This barrier extends the life of the components, ensuring reliable operation on muddy trails for active riders.
【Smooth Rotation】Designed to prevent excessive abrasion of the steering mechanism. Enjoy friction-free handlebar rotation and precise control, making steep descents and tight corners safer and more responsive.
【Rust-Resistant Construction】Made from CNC-machined AL6061 aluminum for reliable strength without added weight. This robust metal resists the elements, providing urban cyclists with lasting structural integrity on wet roads. [Direct Replacement] Precision CNC machining ensures a perfect fit to your 4456ST frame's specifications. Spend less time repairing your bike and more time enjoying smooth rides on the trails with other cyclists.