Why do american speedometers feature kph (kilometers per hour) on the inside and mph (miles per hour) on the outside?

Here's a stock photo of a ford fiesta gauge cluster. Isn't 1 km longer than 1 mile? Therefore, it would make more sense to put km outside and miles inside, right? Why do american speedometers feature kph kilometers per hour on the inside and mph miles per hour on the outside

Can't see

Seen both in different countries, doesn't bother me.
Live with it.

Canada uses the metric system-kinda. Many 'metric' countries also use miles. Watch the 'Grand Tour', they use miles not kilometers…

MPH on the outside because that is the predominant speed in the USA and is therefore larger/easier to see numerals.
KPH in case the vehicle is ever used in a metric country where KPH is used. Less chance of that with USA registered vehicles so numerals on the inside and therefore smaller.

No, a km is shorter!

< isn't 1 km longer than 1 mile? >

No, there are about 1.6 km to 1 mile

If you buy a car in Canada, which posts speed limits in km/hr, the km/hr is on the outside.

Mph is on the outside because you well read the outer one more often, km is 5/8 of a mile. Just the way it is.

No, in the US we work/ operate on mph not kph. 1km is 6/10 of a mile so less than a mile.

Well, it's a case of most Americans care about miles, not kilometers, so those are on top (also larger).

Why? Because the US Is bordered by two countries that use KPH instead of MPH and millions of Americans visit those countries every year by car.