EC34/EC34 HeadsetDescription This style is often referred to simply as an 1 headset which, most of the time, is enough of a description to get you the correct headset. But nowadays with all the different headset standards available we needed to get specific. The EC34EC34 headset is designed to fit frames with straight 34mm 34mm head tubes and straight 1 (28. 6mm) fork steerers. The EC stands for External Cup meaning the section of the cup that houses the bearing sits
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