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Simplified the formula for overall wheel height in inches is
(A * B / 1270) + C
where A, B and C are the width in mm, relative sidewall height% and rim size.
You can just fill in the numbers as listed on the tire: the (A/B/C) formula.
So (205 / 40 / 17) makes
(205 * 40 / 1270) + 17
= (205 * 4 / 127) + 17
= (820 /127) + 17
= 6.4567 +17 = 23.4567 inches.
(funny coincidence, all ascending digits)
In centimeter it would be (A * B / 500) + (C * 2.54).
The example makes (205 * 40 / 500) + 17 * 2.54) = 16.4 + 43.18 = 59.58 cm.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
  lifetime FE over 0.2 Gigameter or 0.13 Megamile.
For confirmation go to people just like you.
For education go to people unlike yourself.
Last edited by RedDevil; 08-04-2014 at 09:01 AM..
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