Nothing screams freedom more than using ancient terms like horsepower and measuring tires in inches and percentages.
The other day I heard an American talk about a TV being 65 inches. Took me a while to understand they had a 165 centimeter diagonal television.
most tv makers and electronics stores in europe give you the screen size in inches first and cm second. they only come in a few common sizes so the specific units dont really matter.
I bet you’d use lightyears over petametres or exametres though.
It's more typical to use parsecs in practice for astronomy.
Speaking of tires, its actually a crazy mixture of units here in the US. You might have a size like P215/65R15 which translates to a radial passenger tire of a 15" rim, 215mm wide tread (sidewall to sidewall), and an aspect ratio of 65 which is a ratio of the sidewall to tread width.
So a tire size is expressed in inches, millimeters, and ratios.
Surely you mean tyres? It’s all arbitrary. Get over yourself.