Low car diet
Join Date: Aug 2007
Location: Corvallis, OR, USA
Bikes: 2006 Windsor Dover w/105, 2007 GT Avalanche w/XT, 1995 Trek 820 setup for touring, 201? Yeah single-speed folder, 199? Huffy tandem.
NO...you have a loose headset.
You can't just tighten the bolt on top, it's really just there to initially tighten the headset, but it's the bolts in back that keep it all in place.
Loosen the two (assuming two) bolts on the back of the stem just enough so you can turn the stem freely around the fork steerer tube while the wheel stays pointing forward.
Tighten down the bolt on the top of the stem that goes into the steerer tube, just tight enough so that the play while rocking the bike goes away, but not so tight* that the wheel can't rotate left and right freely. (*edit: typo fixed)
Align the stem to the wheel and tighten the two bolts in back.
Edit: I still remember the first time I learned how to do this. It made me realize just how easy most things on a bike are to maintain, adjust and repair. Check out these two sites:
Last edited by JiveTurkey; 12-18-07 at 12:20 PM.