
Specialized
Demo Complete Headset: ZS49/28.6mm Top, ZS49/30mm Bottom
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Description
- Upper & Lower Cups: 49.65mm OD x 15mm depth Zero Stack (ZS49) press-fit headset cups.
- Upper & Lower Bearing: 41mm OD x 30.15mm ID x 6.5mm Thick (45x45 degree)
- 46mm OD / 4mm tall alloy top cover.
- Split alloy compression ring, 6mm tall.
- Split alloy crown race for 1-1/8" bearing with 30mm ID.
| Upper ID: | 49mm |
| Lower ID: | 49mm |
| Crown Race Seat Diameter: | 30mm (1 1/8") |

