This headset will only work with 1 1/8" steerer tube forks (except taper specific models). We manufacture our headsets to the IS standard set out by Cane Creek. There are 2 parts to the headset the type and the length.
UK MADE - Slackerizer Angleset Headset - Superstar Components
Steel Bike Headset Bearing Compatible with For Giant Bikes Using 36/45 Degree Bevel Angle Headset Systems Dimensions 30.15 x 41 x 6.5 mm
Steel Construction Bike Headset Bearing Compatible with For Giant Bikes Using 36/45 Degree Bevel Angle Headset Mounting Dimensions
Works Components 2.0 Degree ZS49-EC49 Angle Headset - Headtube Length 124-131mm
UK MADE - Headset Bottom Cup - Superstar Components - Sealed Cartridge Bearings
UK MADE - Headset Top Cup - Superstar Components - Sealed Cartridge Bearings