Thank you very much for going to the trouble to do this. I owe you a cold one in Ouray next month.
I wish we could star a thread where everyone measured what they own (off the vehicle) so we could all know exactly what the size is, its clear the chart is just close at best.
For instance...
Real measurements.....
Overall diameter:
285 = 32 13/16"
255 = 33 5/16"
Tread width:
285 = 9 1/2"
255 = 9 1/16"
Overall width (at widest point in sidewall):
285 = 11 9/16"
255 = 10 3/4"
FROM THE CHART
Overall diameter:
285 = 32.83
255 = 32.8
Tread width:
285 = 9.08
255 = 8.9
Overall width (at widest point in sidewall):
285 = 11.4
255 = 10.2
The chart is very close on all of these with a few exception, but the exceptions are important.
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