why do speedometers go as high as 140 – 160 mph but some average cars can’t go faster than 100 -120?

Question

why do speedometers go as high as 140 – 160 mph but some average cars can’t go faster than 100 -120?

In: Technology

Answer 1

It comes from gaugeing standards where the gauge needs to have 50% greater readable range than the set operating range.
This way you know when and by how much something is exceeding said operating range and then can adjust/fix this before it causes damage.