04-01-2016, 03:08 PM | #1 |
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Tire Size & Speed calculations
I am curious to learn how tire size, if at all, affects speed,distance, traction, stability control etc. calculations.
If I have 18s and go to 20s how does the computer calculate the correct speed? How would the car know that with bigger wheels every revolution covers a little more distance? There is ~11.1% more distance covered per revolution just based on going from a rim size of 18 to 20. |
04-01-2016, 03:24 PM | #2 |
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With larger wheels the tire profile is reduced, which means that the overall tire diameter is kept almost the same.
The tire profile is reduced by 5% for every inch in wheel diameter increase. For example for 225 tires: 225/45-18, tire diameter 25.9" 225/40-19, tire diameter 26.1" 225/35-20, tire diameter 26.2" |
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04-03-2016, 08:31 PM | #3 | |
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Quote:
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04-03-2016, 09:36 PM | #4 | |
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Quote:
https://www.rimsntires.com/specspro.jsp |
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04-07-2016, 02:07 PM | #5 | |
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Anything within 3% of the original overall diameter is considered acceptable and and somewhat within spec. |
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04-08-2016, 08:57 AM | #6 | |
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Keep in mind, lower profile tires will ride stiffer and you will have to steer clear of potholes as the lower profile tires do not provide as much protection. |
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