For tapered steerer (can be converted to 1 1/8 steerer through purchase of a FS160-5538 crown race) FSA Part Number 121-0501 Not sure if this is the one you need? Check out the handy FSA Headset ID Tool here http://www.fsaeasyheadset.com/
Good Rotations is an independent online bikepacking and adventure cycling store.
If you are looking for a complete brevet or expedition setup, advice on gear, or help with finding the right bikepacking bag or dynamo system, we're here to assist.
Get in touch: email@example.com