Cane Creek 10 EC49 Headset Bottom

EC49 refers to an External Cup headset designed for a head tube with an inner diameter of 49.61 mm. This standard is common on many mountain bike frames, but you should verify your frame's specific head tube measurements before purchasing.

Yes, this bottom assembly is designed for a 1.5-inch tapered steerer tube, which corresponds to the 39.79 mm crown race diameter. It will not work with a straight 1-1/8 inch steerer.

The polymer crown race is lightweight and provides a precise, self-centering fit that helps reduce friction. It is durable and corrosion-resistant, making it a reliable choice for long-term use in various riding conditions.

Yes, installing an external cup headset requires a dedicated headset press to seat the cups into the frame without damaging them. If you do not have access to a press, your local bike shop can handle the installation quickly.

While the bearings are sealed to keep out contaminants, they are not maintenance-free. Depending on your riding environment—especially if you ride in wet or muddy conditions—you should inspect and re-grease them at least once or twice a year to maintain smooth steering.

This bottom assembly adds 12 mm of stack height to your bike's front end. Keep this measurement in mind when calculating your total headset stack height to ensure your fork steerer tube is long enough.