Correction to tire/speed calculation

["Daren Stone, D2 Mfg. Engr. C5/6, 5-9521" <DSTONE@SC9.intel.com>]

          I knew it. As carefully as I typed it all in, I
     overlooked something very incorrect on this morning's
     post of simple rpm/mph formula. The tire size should
     be CIRCUMFERENCE in feet, not diameter. Hey, it was
     early. Oddly enough, I only got one reply correcting 
     me, from Mike Gendimenico (geesh those intel people are
     sharp ;-). I guess either no-one read it, or no-one 
     noticed. 

          cheers and oops-     
                          dstone@sc9.intel.com