Maybe if we try the percentage difference in diameter? The following is done on a friday, errors are inherent. Diameter = wheel size + (2 x ratio x width) Therefore diamter of a 205-70 on 15" is 26.3in and a 185-70 on 14" is 24.2in Difference is 8.6 % Speedo will read about 8-9% slower? Éric
At 02:52 PM 20/07/2001, Bill Kasper wrote: >on 7/20/01 11:41 AM, Aristotle Sagan at killer_jupiter@HOTMAIL.COM wrote: > > > You have a couple of choices tire sizewize... > > 205R65-15 or 215R60-15 are both about the equivalent of a 195R78-14. The > > 185R7814 is a bit smaller. > > > > As your tire size (circumference) goes up, your speedo reads slower. > > >by what percentage? i mean, if i am showing 65, i'm going what, 67? > >bill >'87 syncro westfalia >http://www.scruznet.com/~kasper/pics/westy/ |
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