They are new, been riding them for I guess about a month. Can't remember if I've tried hands-free in that time.
Why would new wheels cause this problem, or what would wear so that it goes away?
Could it be that when I put tires on these wheels (same tires as I was using before*), my Mr Tuffy's slid way to the left, and that little bit of imbalanced spinning weight is causing a gyroscopic effect?
(Actually before I had Conti CountryRide 700x37 on the back, and Conti something 700x32 on the front; now I have the 37 CountryRides both front and back, so the front tire is different than before, since I put the new wheels on)