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>several snips included
>>And a couple of things about speedo error.  I don't know the original
>>tire (tyre) size for the TR-6 but if it was a 185/80/15 the following
>>shows the speedo errors for some other sizes.  These are aproximates,
>but
>>they should be close.
>
>>The formula for this is:
>>(Original Tire Diameter/Replacement Tire Diameter) x Indicated Speed
>
>Is this formula backwards?
Yes the formula is backwards,  A slip of the keyboard.
But the Chart shows correct numbers, note that the shorter tire
has a higher speed indicated.
>>Speed at
>>Indicated                               Approximate
>>55 MPH.                Tire             Diameter (inches)
>
>>55                     185/80/15        26.6
>>60                     185/65/15        24.5
>>56                     205/70/15        26.3
>>59                     205/60/15        24.7
>>54                     215/70/15        26.9
>>57                     215/65/15        26.0
So Long,
Darrell Leach,   KD6LRC   DM-15,   Ridgecrest, Ca
  email: Triumph_TR4@ridgecrest.ca.us
         http://www.ridgecrest.ca.us/~token/PAGE1.html
1962 TR-4 (CT5368LO)  Everyday
1962 TR-4 (CT13108L)
1965 Spitfire Mk 2
1967 Spitfire Mk 3   In work, lots of 1500 stuff
Keeper of the TR-4 List, Version 2.0 availible.
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