Pro tip: The old way to set a threaded headset is still the best way

I keep seeing newer mechanics just crank down the top cap until the play is gone, which puts way too much preload on the bearings. The right way is to tighten it just enough to remove the wobble, then back it off a quarter turn before tightening the stem bolts. I learned this from a shop owner in Portland about fifteen years ago, and it's saved countless headsets from early wear. It's a tiny adjustment that makes a huge difference in how long the parts last. Has anyone else noticed this becoming a lost skill?

3 comments

3 Comments

rowanp157d ago

My first bike build, I cranked that top cap down like I was trying to squeeze juice from a rock. Wondered why the steering felt like moving through wet cement for a whole summer. Found the quarter-turn trick in an old Zinn book and felt like a total goof. It's one of those things that seems wrong until you feel how smooth it is.

rowan_thomas7d ago

Wait, is it always a quarter turn back? I've found it changes a bit with different headset types, so I just loosen it until the bars turn smooth with no play. That tiny bit of wiggle room makes all the difference.

felix4787d ago

Tbh that "wet cement" feeling Rowan described is exactly right. I did the same thing on my old road bike and just thought all headsets were kinda crunchy. Honestly it's crazy how many people skip the quarter turn back off, I see it all the time. It's one of those simple fixes that feels like a secret hack once you finally learn it.