At 11:12 AM +1000 14/5/98, Darrell Leach wrote:
>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
The heading on the first column suggests a constant indicated speed, in
which case, a shorter tyre will produce a lower actual speed and vice
versa. If you really do mean the actual speed at an indicated speed of 55
mph, then the table is also reversed; not just the formula.
Trevor Jordan
74 TR6 CF29281U
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