With a proper headset press, it's a breeze to install. With a homemade headset press, it's still pretty easy. If you don't have either, bring it to a shop. For something so nice, it's not worth hammering it in. You should replace the crown race too. It's the angular piece attached to the fork.
Your stem and bar will be fine.
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Originally Posted by
sp00ki
Using a nicer sealed bearing headset vs a $10 set is like throwing a frisbee vs a dodgeball.