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I accidentaly multiplied the circumfrences by two. I didn't realise I did until I thought about just how long just under 400cm is.
Let's try that again, and I'll reword the part about the differences in circumfrence:
195/60/15 = 193.2079482cm
205/50/16 = 192.0769748cm
205/45/17 = 193.6163552cm
215/40/17 = 198.6893644cm
215/45/17 = 196.4437886cm
As for differences in circumfrence, what is considered an acceptable difference? And compared to which circumfrence?
When you think about it, the stock non-turbo and GLT low pressure turbo, as well as recommended snow/winter tire sizes for the base, GLT, Turbo, T5-R and R, is 195/60/15. And the Turbo, as well as some T5-R's and R's came with 205/50/16. And lastly, the some T5-R's and R's came with 205/45/17.
If you compare the three, there is now an approximate 1.5393804cm discrepincy between the smallest and the largest.
So what circumfrence do I use as a reference point in determining acceptable difference in circumfrence? And once again, what is considered an acceptable difference?
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