Sure. But it requires a very accurate scale and a good bit of inconvenient and difficult travel.
My Fox Sterlingworth with lengthened chambers AND cones would weigh more at the pole (pick one) than at the equator.
Gravity is inversely proportional to distance you see.
Before we part agreeing to disagree, consider this
Do you suppose an inner tube ads any strength to the tire?
If by strength you mean resistance to internal pressure, then of course, if the inner tube wall is uniform and all else being equal, the tire with the tube will withstand more pressure. That's pretty basic engineering. I beginning to think that you are more interested in appearing clever than in the underlying subject of pressure. Furthermore the subject of gravity is far more complex than you seem to think and you could certainly not determine the shape of the planet by your method. Gravity varies all over the surface of the Earth, lots of research on this by the US Navy. This is my absolute last post on this thread. Having worked for the Navy on nuclear subs I'll bet I spent a hell of a lot more time thinking about pressure than you seem to have done. The End.
