R & P means ring and pinion, which is referring to your gear ratio.

Chris

"Cal" > wrote in message
m...
> Bill,
> Thanks for the chart link! Looking at the chart, what is R&P? I
> understand that the top grey line is the tire size (we used 31" tires.)
> But i don't know what the R&P (the numbers in gray from top to bottom of
> chart?) represents.
> thanks for your help!
>
> cal
>
> "L.W.(Bill) Hughes III" > wrote in message
> ...
>> http://www.raingler.com/tech/speedoChart.asp
>> God Bless America, Bill O|||||||O
>> http://www.billhughes.com/
>>
>> Cal wrote:
>>>
>>> Several gears to choose from....how do you determine which one you need?
>>>
>>> cal
>
>