FSA NO.11N Internal Headset

The upper stack height refers to the vertical space the headset occupies above the head tube. A 6.1 mm height is relatively low-profile, which helps keep your handlebar height down, but you should ensure it matches your current headset or accounts for any changes in your stem position.

No, this is an internal headset designed for specific frame interfaces. You must verify that your frame is designed for an internal headset and that the head tube diameter matches the requirements for this specific FSA model.

Yes, the FSA NO.11N is a complete assembly that includes the necessary bearings to ensure smooth steering performance. It is designed as a drop-in replacement for compatible systems.

You need to measure the outer diameter of your fork's steerer tube or check your fork's manufacturer specifications. This headset is specifically engineered for a 1.8-inch steerer, so it will not fit standard 1 1/8-inch or tapered steerer tubes.

Internal headsets tuck the bearings inside the head tube rather than sitting them on top. This results in a cleaner, more streamlined aesthetic for your bike and can slightly lower your front-end profile.