42x52mm Road Bike Front Fork Stem Headset Waterproof Bike Bearing Bowl Group

Manufacturing Material: Made of high quality aluminum alloy material, light weight, not easy to deformation, and service life.

and Unimpeded: The upper and lower double bearing structure of the bowl group, and unimpeded, labor saving and easy . Dustproof and Waterproof: The cover is good for dustproof and waterproof to extend its durability. design, beautiful and generous. Item Type:   Headset Weight: Approx.110g Celsius 3.9oz Material: Aluminum Alloy Applicability: Bowl Set Includes Two Types Of Bottom Guard, Which Can Support Standard Taper Tube Front Fork And Straight Tube Front Fork. Upper Bearing Diameter: Approx.42mm Celsius 1.7in Lower Bearing Diameter: Approx.52mm Celsius 2.0in