ENDURO CHROMIUM STEEL, BLACK OXIDE "MINI ACB" UPPER BEARING 14.2MM X 25MM X 6.5MM USED ON TREK SPEED CONCEPT

Sealed chromium steel bearing with black oxide treatment on the outer surfaces of the bearing races. This is the upper headset bearing for the Trek SPEED CONCEPT frames. It is a relatively small bearing for a headset application due to the fact that it interfaces with the small metal shaft of the integrated aerobar.

TREK PART NUMBER 276442