Demo Complete Headset: ZS49/28.6mm Top, ZS49/30mm Bottom

Complete Zero Stack (ZS) press-fit headset for Demo frames with a non-tapered 49.65mm ID headtube and fork with a non-tapered 1-1/8" steerer.

• Upper & Lower Cups: 49.65mm OD x 15mm depth Zero Stack (ZS49) press-fit headset cups.
• Upper & Lower Bearing: 41mm OD x 30.15mm ID x 6.5mm Thick (45x45 degree)
• 46mm OD / 4mm tall alloy top cover.
• Split alloy compression ring, 6mm tall.
• Split alloy crown race for 1-1/8" bearing with 30mm ID.