Velo-Orange Grand Cru 1" Threaded Headset 26.4 (ISO)

Top-of-the-line 1" threaded headset.

-Over-sized sealed bearings
-Alloy construction
-The fork crown race is split so it slides on without tools
-42mm stack height
-26.4 (ISO) crown race

This is the ISO 1 inch size, used mainly on newer, higher-quality bikes, (Also known as "Campagnolo size."

Crown race 26.4 mm inside diameter

Frame races 30.2 mm outside diameter