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      05-19-2013, 04:49 PM   #34
flip4335
General Nuisance in a Private Conveyance
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Quote:
Originally Posted by surfcity335i View Post
Well, I agree with some of what you said and also think some of it is factually inaccurate. Nevertheless, read my post carefully. The TireRack calculator says that with the taller tire mounted, the speedo will say 61 when the car is really going 60. Not vice versa like you say it should (and I agree with).

My thinking is that, essentially, the car will cover more distance per revolution of the axle on the taller tires, therfore making it go more miles per hour than the shorter tire when the axles are spinning at identical RPM's. Hence, with taller tires (or a larger overall diameter) the speedo should read 60 when the car is really doing 61. Please tell me how I am wrong here.
Man, I musta been drunk when I sent that to you. I stand corrected and apologize for anything I said that was factually inaccurate.

So, when the speedo reads 60 mph for the taller tire at the same rpms as the smaller tire, the car would actually be moving at a slower pace, because the damn tire is taller and has longer to go to make one revolution as opposed to the smaller tire.
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