You should not know this at all! There is a fun xkcd strip somewhere, though. tar in this context : tape archive and tarball is an obscure colloquialism that makes me smile. So, most likely I'm the one that's out of touch.

Consider playing with effective wheel size as an option to adding a bike to your garage ... faster tires likely being skinnier likely bumped your smallest cog effective wheel size down. You could try a new chain and front ring with ~15% more teeth while you're shopping anyway.

Ha! Back in March politeness sure was a good Turing signal ...