I don't tend to keep road bike spares though - no need. Some perish rather quickly - looking at you Mr Michelin Pro 4's !
I've got 3 sets for the old MTB, and again 3 sets for the FS MTB bike. MTB a bit different - Ice studs for both, main use tyres and a set that I have spare.
Eg. the Full Sus - I run all year on Maxis Minions, I have Ice Spikers just for fun when it snows, and also an older set of XC Nobby Nics - they roll well, but grip on off camber and roots isn't great, they slide out. The Minions are lots slower, but they are so grippy.
Commuter has fat MTB tyres from when it wasn't used for commuting, faster rolling commuter tyres (Land Cruisers) and winter tyre - Snow Studs, as Ice on canal cobbles can be a bit lethal. Also have a set of half worn summer tyres too, but they flat too easily.