KBB ACB458 36.8x45.8x6.5 45/45 Specialized FutureShock Headset Bearing

Used on Roubaix, Ruby and Diverge 2017 Models onwards using Future Shock Headset (equivalent to Specialized part refs: S182500006 & S172500014). Bearing ID: 36.8mm. Bearing OD: 45.8mm. Bearing Thickness: 6.5mm.

eBay