Wheels or Doors

[Pearl Jam]

As per title, a question I heard on Vernon Kaye’s show ( Radio 2 in the UK ) the other day.

Are there more wheels or doors in the world?

Ok, wheels obviously.. cars ,bicycles,any motorised vehicle, even suitcases

But then think about doors, how many houses in the world, and each of them houses will have many doors and not even beginning to count kitchen doors, wardrobe doors ..

Then you go back to motorised vehicles having wheels but also the vast majority will have doors too 😂

Anyways, just thought I’d share with all you good folks

 

[Liquid]

This topic was a thread that was recently exorcised. I can't remember what the consensus is but the semantics being argued were over a door counting as "portal" or "entry" and wheel to include any rotating circular component, which opened up huge possibilities.

 

[Greycap]

Consider the fact that Lego is the world's biggest tyre manufacturer by a huge margin and there's no closing that can of worms.

 

[GT_brickhole]

Consider the fact that Lego is the world's biggest tyre manufacturer by a huge margin and there's no closing that can of worms.

how many doors and portals does Lego also make?

but i feel the answer to OP is wheels.

 

[Joey D]

Wheels. Think of all the machines that use bearings and gears.

 

[Eunos_Cosmo]

An RTX 4090 Card has about 20 billion logic gates. A gate is a door, yeah?

 

[sesselpupser]

As @Liquid says, the answer is going to vary wildly depending on the definition. If a "door" could be understood to mean a flat piece of material (that is, wider and/or taller than it is thick) on a hinge that opens and closes, some protectors can have nearly 25 million tiny doors in them (microscopic mirrors on DLP chips), nearly 100 million if 8K 3 chip DLP projectors exist now.

But, if a wheel can be anything that rolls, not only are ball bearings or needle roller bearings potentially wheels, but the balls or needle rollers within them could also be wheels. If cogs, sprockets, gears etc. could also be considered wheels, then the average bicycle has the two wheels with tyres on, each of the loose bearings in the hubs for those wheels, bearings in the cassette, multiple sprockets on the cassette, up to three in the crankset, the bottom bracket has at least two bearings in it, the pedals have more loose bearings, the derailleur has two jockey wheels, the chain has two rollers in every link... Multiplied by all the bicycles in the world...

Oh god why did I read this thread

 

[jackkix]

If you count gears, bearings, and pulleys as wheels, then doors don’t even make the podium.