CNC 1-1/8" Bicycle Headset，41.8-52/44-56mm Headset Size： MTB Headset Use for 1-1/8" inch (28.6mm) Straight Fork or 1.5 Inch Standard Taper Fork , Headtube ID: 41.8-52mm；Headtube ID: 44-56mm.Performance：Bike Stem Headset Made of Aluminum Alloy，CNC machined,Anodized surface treatment., Anti-rust, sturdy，durable and smooth.CNC High-precision Processing：Threadless Headset fork bearings adopts CNC high-precision processing, rotation is very flexible and lubricated, and the rotation is very stable and the noise is very low and the built-in sealing ring helps prevent dust and water from entering, which can prolong the service life.Use For: Road bike Headset suitable for mountain bike, MTB ,BMX, etc. Easy to install and remove. Use for 1-1/8" inch (28.6mm) Straight Fork or 1.5 Inch Standard Taper Fork , Headtube ID: 41.8-52mm. Note: Headtube ID: 41.8-52mm, either for straight forks or cone forks; The method of use is shown in the figure.If not satisfied with CNC Mountain bike headset,，We will give you a free in 90 days. Use for 1-1/8" inch (28.6mm) Straight Fork or 1.5 Inch Standard Taper Fork , Headtube ID: 44-56mm. Note: Headtube ID: 44-56mm, either for straight forks or cone forks; The method of use is shown in the figure.If not satisfied with CNC Mountain bike headset,，We will give you a free in 90 days. Bicycle Headset installed from the top to the bottom and the parts are displayed. Bicycle Headset Installation sequence diagram from top to bottom，Please be careful not to install it wrong. If you have any questions, please ask us in time. Bicycle Headset Installation sequence diagram from top to bottom，Please be careful not to install it wrong.If you have any questions, please ask us in time. 41.8-52mm 44-56mm Add to Cart Add to Cart Customer Reviews 4.0 out of 5 stars 24 4.0 out of 5 stars 24 Price $17.88$17.88 $17.88$17.88 Headtube ID： 41.8-52mm 44-56mm Front fork model: Straight fork and Taper Fork Straight fork and Taper Fork