Headset Information

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The DVO Emerald uses a Tapered 1 1/8″ to 1.5″ steer tube. Your frame must have a straight 1.5″ head tube or a tapered 1 1/8″ to 1.5″ head tube. Depending on your frame manufacturer you will either have a external cup press-fit or integrated style headset. Please contact your bike manufacturer to make sure you have the correct headset configuration that can accept a tapered steer tube for your frame.

Common Headset Sizes and Styles
EC49 – External headset lower 1.5″. This is a pressed in headset where the bearing sits in a cup on the outside the frame
ZS56 – Internal headset lower 1.5″.  Internal cups press almost completely into the frame. These are often preferred for their low stack height and clean look.
IS52 – Integrated headset lower 1.5″.  A bearing (usually a sealed cartridge unit) sits directly into the frame eliminating the need for cups.  Found on many carbon fiber bikes today.

Headset Styles