FSA Angular Contact headset bearing for Trek Domane MR006, TH-072E, W540243. 40mm x 51mm x 6.5mm 36/36 degree.Brand new bearing sealed in packaging.
The Gen 4 Domane with integrated cables passing through the top bearing has the same bearing in the upper and lower positions. The same bearings was used as the lower headset bearing in earlier versions of the Domane without integrated cabling.
Alternative part numbers from other manufacturers for the same bearing includes ACB6808 and ACB4051K
Make sure bearing is correct for your application before buying.