[Closed] can a tyre weigh more or less than itself????

They weigh less when filled with air - FACT.

I think they are [i]heavier[/i] when filled with air.

Didn't Stans used to charge extra for the lighter versions of the same model?

Intel used to (and probably still do) sell versions of the same CPU with different clock speeds. What they actually did was manufacture them using an identical process and then test them at various speeds. The ones that proved stable at the higher speeds got labelled and configured with that speed.

That's how Scott (used to at least) assign their frames too - weigh them as they come off the production line, lightest ones are Ltd, then RC, then 10, then 20 etc etc.