This morning I checked the alignment of the MLG wheels and they weren't off by too much: 0.2º toe-out on the right wheel and 0.6º toe out on the left wheel. That's probably not enough to worry about but I may try and correct it if I can find an easy way.

I did discover the real problem, though. When I put the plane up on jacks and spun the wheels, the left main and nose both spun about 1-1/4 turns. The right main would hardly turn at all. The axle nut on the right wheel was one flat too tight. The wheel was dragging and my brand new tire had several flat spots on it. When I loosened the axle nut, the wheel turned freely so it wasn't the brakes per se. I DO need to inspect the brakes on that side as well because things got pretty hot over there.

I'm just glad it's not the oleo strut!

Do we have an end-play specification for tightening the axle nuts?

Thanks for all the suggestions, everybody --