DYI: How to Tighten a Headset on Bicycle

The tightening of loose headsets is a bicycle adjustment that should be performed on a regular basis. Most common headsets are nonthreaded, integrated bearing types that are easily tightened. Loose headsets can be recognized by a characteristic knocking sound when the bike passes over bumps. Headsets should be snug, but not too tight. Properly tightened headsets keep bearing wear to a minimum. After tightening the headset, the front tire of the bike should swivel smoothly side-to-side without sticking or producing unnecessary friction.

Things You'll Need

  • 4 mm Allen wrench
  • 5 mm Allen wrench
  • Grease
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Instructions

    • 1

      Loosen the two pinch bolts, sometimes referred to as binder bolts, using a 4 mm Allen wrench. These two setscrews are located on the bicycle stem (the part that holds the handlebars to the bike) just above the bike's top tube. They are perpendicular to the ground about a half-inch apart.

    • 2

      Loosen the bolt that holds the cap on top of the headset with the 5 mm Allen wrench. It will be the larger setscrew that is vertical or facing straight up. When sitting on the bike seat looking straight down, it is the first visible setscrew and also the biggest.

    • 3

      Turn the setscrew until the setscrew and top cap comes off. Pull out the bolt and inspect the bearings and bolt threads for dirt or loose metal filings. Clean with a soft cloth.

    • 4

      Apply grease to the threads of the bolt. Reinstall the bolt, threading it back into the headset and seating the cap. When the bolt begins to tighten, give the bolt another turn. Slightly tightening it until it is snug but not tight.

    • 5

      Straddle the front end of the bike from the front, holding the front tire between your legs. Holding onto the handlebars on each side, sight down the bike's top tube. Align the handlebars by moving the handlebars side to side, centering and aligning them with the seat and top tube of the bike.

    • 6

      Tighten the 5 mm setscrew snug with a moderate amount of force. Using the 4 mm Allen wrench, tighten the pinch bolts, alternating back and forth between the two of them until they are both snug.

    • 7

      Check for tightness by holding both front brakes with both hands and rocking the bike forward and back. If the headset is not tight, you will hear a slight clicking sound. Loosen the pinch bolts, tighten the 5 mm setscrew and retighten the pinch bolts. Test again until there is no noise.