ITEM NAME:Headset Threaded Ahead 1inch Mountain Bike Road Hybrid With Bearings Headset Description: 100% brand new and high quality. Sealed cartridge bearings. Delicate appearance,sturdy and durable. The headset fits bikes/frames with threads headtubes and forks. Suitable for MTB,road bike,fixed gear etc. Specification: Material: Iron and Plastic Stack Height: 58mm Size: 1 Head Stem-Build: external Cartridge Bearing Diameter:22.2/30-30/27(mm) Package Includes: 1 Piece Bike External Headset Note: Please allow 1-3 cm differs due to manual measurement. SKU: DMO0020861265009170.Stack Height: 58mm. 1 Piece Bike External Headset. Head Stem-Build: external. People always bought together with.