* 1.1/8" semi-cartridge type upper
* Retainer bearings lower
* For tapered 49mm/55mm OD head tube
* 1/1.8" steerer
* Alloy top cover
* Steel upper cup with forged alloy lower cup
* Upper: semi-cartridge bearing
* Lower: Ã5/32" Ã 26 retainer bearings
* Stack height: 18.7+11.9=30.9mm
* Weight: 188g
**Spares**
* Crown Race: H6051 (160-5503)