High School

Jackson changed out the factory tires on his car and put bigger tires on. His original tires had a reading of P195/65R17, and he replaced them with tires with the reading P285/75R17. What is the change in tire width, aspect ratio, and rim diameter?

A. Change in width: +90, Change in aspect ratio: +10, Change in rim diameter: 0
B. Change in width: +90, Change in aspect ratio: +10, Change in rim diameter: +17
C. Change in width: +90, Change in aspect ratio: +20, Change in rim diameter: 0
D. Change in width: +90, Change in aspect ratio: +20, Change in rim diameter: +17

Answer :

Final answer:

The change in tire width is +90mm, the change in aspect ratio is +10, and the change in rim diameter is 0.

Explanation:

The tire size notation P195/65R17 represents the width (in millimeters), aspect ratio, and rim diameter (in inches). Therefore, the change in tire size from P195/65R17 to P285/75R17 is as follows: The original tire had a width of 195mm, and the new tire has a width of 285mm. Therefore, the change in width is +90mm. The original tire had an aspect ratio of 65, and the new tire has an aspect ratio of 75. Therefore, the change in aspect ratio is +10. The rim diameter remained the same at 17 inches, so the change in rim diameter is 0. Thus, the correct answer is 'a) Change in width: +90, Change in aspect ratio: +10, Change in rim diameter: 0.'

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