Yes, I have seen this type of speed indicator in use in Japan at a lift truck manufacturing plant in the mid 1980's - I'm certain it has been in use before then. Japan is a very saftey consious country. As explained to me the width of the painted segment at the circumference of the tire was calculated based on the tire diameter, plant travel speed limits. From that point the segment was tapered towards the center of the tire/wheel.
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