In the spirit of being helpful, I've busted out the calculator and my 10 key skillz to compute revs/mile.
If you're going off of anything other than straight math, feel free to edit or remove this info.
ASSumption: 5280 feet per mile. 12 inches per foot. 5280*12=63360
Circumference=Diameter*pi
inches
63360/circumference = revs/mile
Tire Size ........ Diam. . Rev / mi
175 / 70 - 14
.. 23.7"
.. 851
185 / 70 - 14
.. 24.2"
.. 833
185 / 65 - 14
.. 23.5"
.. 858- OE size
195 / 65 - 14
.. 24.0"
...840
195 / 60 - 14
.. 23.2"
.. 869
205 / 60 - 14
.. 23.7"
.. 851
215 / 60 - 14
.. 24.2"
.. 833
195 / 60 - 15
.. 24.2"
.. 833- OE size
205 / 55 - 15
.. 23.9"
.. 844
205 / 50 - 15
.. 23.1"
.. 873
215 / 50 - 15
.. 23.5"
.. 858
215 / 55 - 15
.. 24.3"
.. 830
225 / 50 - 15
.. 23.9"
.. 844
195 / 50 - 16
.. 23.7"
.. 851
205 / 45 - 16
.. 23.3"
.. 866
205 / 50 - 16
.. 24.1"
.. 837 OE size
205 / 55 - 16
.. 24.9"
.. 810
215 / 45 - 16
.. 23.6"
.. 855
205 / 40 - 17
.. 23.5"
.. 858
205 / 45 - 17
.. 24.3"
.. 830
215 / 40 - 17
.. 23.8"
.. 847
215 / 45 - 17
.. 24.6"
.. 820 OE size
215 / 35 - 18
.. 23.9"
.. 844
215 / 40 - 18
.. 24.8"
.. 813
Quote:
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Originally Posted by Oreo
EDIT: Thanks to Z63R for pointing out that REV per MILE INFO IS INCORRECT. I am currently updating this table with the correct information. Sorry to anyone who I've inconvenienced. My original source was faulty. 
In light of just having to adjust my speedo with my Xcal2 to read correctly with my new tire size, I thought I'd add a little value to this chart by adding the revolutions per mile for each tire size. I also noticed that most of the tire diameters were off by a tenth or so, and I corrected where appropriate. |