Schwinn HYBRID BICYCLE Owner's Manual page 50

4 Adjustments
Adjusting a Threadless Headset
Threadless headsets are similar to threaded headsets, they use
two sets of bearings and bearing cups. Unlike a threaded
headset, a threadless headset does not have an upper threaded
race or use a threaded steerer tube. Instead the steerer tube
extends from the fork all the way through the head tube and
above the headset and is held in place by the stem clamped
on top.
Conduct the following checks to determine if there is play in
the headset:
❶ Shakiness: Apply the front brake and push the handlebars
back and forth, front to back. Or if the bicycle is on a
workstand and the front wheel removed, push and pull on
the forks. If you feel a knocking sensation or "clunk" it
means the headset is too loose. Important! Use care with
suspension forks, because the legs may have play in sliders.
Grab upper portion of fork. Figure 4.39
❷ Stiffness: Lift the front of the frame so the front wheel is
off the ground. The handlebar and wheel should flop to one
side or another. If there is drag or binding the headset is
too tight.
48
1
Headset
2
Figure 4.39