| Description | Fork Steerer Diameter | Headtube ID | Stack Height |
| 1-1/4 to 1-1/8″ | 1-1/8″ | EC37 (for 1-1/4″ Traditional) | Adds 2mm |
| 1-1/8 to 1″ | 1″ | EC34 (for 1-1/8″ Traditional) | + 2mm |
| Headshok to 1-1/8″ | 1-1/8″ | 2″ | + 19mm |
| 1.5 to 1-1/8″ | 1-1/8″ | EC49 (for 1-1/2″ Traditional) | + 9mm** |