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Indy cars do not have speedometer. Instead they measure speed by the Revolutions Per Minute (RPM) of the engine through the use of a tachometer. By using tire diameter, gear ratio's and engine RPM the true speed of the car can be calculated.

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14y ago
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15y ago

It's unnecessary. They are trying to go as fast as they can anyway, and are more concerned with information pertaining to RPM's, temperature & pressure.

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12y ago

No. They only have tachometers.

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Q: Why dont NASCAR race cars have speedometers?
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