– 1-1/8″,36°/ 45° ACB- 1-1/8″ steerer- For tapered 50mm /62mm OD headtube- Upper Headtube 44mm ID- Lower Headtube 56mm ID- Alloy top cover- Forged alloy shallow cups- Stack height: 16.9+2.9=19.8mm- OEM packing- Color: Black (as pic. shown)- Weight: 141g (includeing top cap and starnut)Content: 1 set/pack