Bill, if you go to this Coker Tire site there's a tire conversion chart. Example a 215/75x14 converts back to a G78x14. http://store.coker.com/pages.php?pageid=18 You can also go to their homepage: http://cokertire.com/ Click on the "Tire Size" drop down menu and click on what size tire you want to know about. Click on one of the tires that pops up in that size and it'll give you all the info including the "overall diameter" of that size. For example a 215/75R14 is 27.11" in dia. Hope that gives you the info you need, Dan Bill wrote: > > Posting this directly from Topica since my email's not talking to it > again... > > I'm trying to find info on how to convert modern tire sizes > (215/75/14) to the old sizes (D75-14). I ultimately want to figure out > what is the correct speedo gear is for my current setup. > > The wife and I went to the Herr's Cruise Night in Nottingham, PA last > night w/ the Coronet and my Model T. I was trailering the T home and > driving no more than 55-60 mph. She was following me also supposedly > going 60 mph and fell back VERY quickly, so the speedo is most > definitely reading fast. > > Anyone have any charts, websites, and or calculations they can provide > to point me in the right direction? > > Thanks > > Bill M > 65 Coronet 500 'vert ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.