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| Manufacturer part # | ZS44/28.6 | ZS56/30 |
|---|---|
| Steerer outer diameter | 28.6mm (1-1/8") / 38.1mm (1-1/2") |
| Crown race inner diameter | 28.6mm |
| Stack height | 7mm |
| Bearing type | Sealed |
| Headset type upper | Unthreaded semi-integrated |
| Headset type lower | Semi-integrated |