Are Headset Spacers Necessary?

No, you don't need to run spacers between the headset and stem. It's hard to tell what, exactly, you'll need without actually putting everything together.

How many spacers should a headset have?

Generally, most bikes have 20 to 30mm of headset spacers that can be moved freely above or below the stem.

Do I need a headset shim?

If you are attempting to preload the bearing and, no matter how tight you get the preload bolt, there is still movement in the headset then you likely require Shim Spacers. ... The trick is to have just enough so that the Bearing Cover sits off of the headtube just enough so the seal still protects the bearing from debris.

Alexander Ross

Alexander Ross

Gaming, Esports & Interactive Media Writer

Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.