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| Manufacturer part # | 557045 |
|---|---|
| Steerer outer diameter | 28.6mm (1-1/8") |
| Crown race inner diameter | 39.8mm |
| Cup Insertion OD | 49 mm Top/56 mm Bottom |
| Stack height | 9mm |
| Bearing type | Sealed |
| Headset type upper | Unthreaded semi-integrated |
| Headset type lower | Semi-integrated |
| Material | Aluminum |