Seriously it just happened.

I noticed on one ride, the headset came loose. So we tightened it mid-ride (stopped by a shop to borrow wrenches), and the rest of the ride went fine.

Our next ride was the Devil Mountain Double Century (206 miles with 20k feet of climbing). Around mile 55 the headset became tight on a descent and the bars became difficult to turn, the steering became heavy.

We got to the flats, and the bike became difficult to keep in a straight line.

We called SAG twice, and both times loosened the headset to see if we could complete the ride. Both times the bars became stiff after a few more miles. Eventually, we realized our ride was over since the problem was not going away, so we SAG'd it in a mile 80.

I brought it to a shop to install a new Chris King Headset. When removing the stem, the fork broke in two!

It's probably been cracked for a while.

We ended up ordering a NOS Santana 1" Chrome steel fork. I would have got a nicer fork, but we are getting a Calfee this summer, so the money is not worth spending.

However we do need our tandem up and running until then. I should have it ready by Friday. We have been invited to ride in the Devil Mountain Double Staff Ride this Saturday.