If the frame is new it's much better to have a shop do it as they'll usually face (and ream if it needs if).
If it's been done before then you'll need a headset press. You can make one your self - google for instructions. It's also worth putting the headset cups in the freezer to reduce their size a faction.
£20 is standard.
If the frame is new it's much better to have a shop do it as they'll usually face (and ream if it needs if).
If it's been done before then you'll need a headset press. You can make one your self - google for instructions. It's also worth putting the headset cups in the freezer to reduce their size a faction.