Warren and All: 1) I changed the subject line to "Tires" rather than "300F" as we're talking tires in general 2) Subject has been addressed at length in past posts and I agree about risks with old tires of any type (over 10 yr old) 3) New information perhaps: a. Performance driving - Diamondback wide whites are high quality radial tires such as Michelin, Cooper etc. to which a wide whitewall has been permanently vulcanized to the tire. Some of these tires are performance tires with high speed ratings. One can drive them hard if one desires, and they will be as safe as the corresponding blackwall that they started out life as. b. Some other radial wide whitewalls have speed ratings. American Classics are S rated (112mph). Personally, I would not drive anywhere near that fast on American Classics or Diamondbacks but that has more to do speed limits, the fact that the tires are very expensive, and in deference to 50+ year old rare cars (like 300s). c. I doubt that bias ply tires are speed rated but I wouldn't buy them anyway unless I had absolutely no other choice for a proper fitting tire Carl Bilter _____ From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Warren Anderson Sent: Friday, May 18, 2012 3:38 PM To: bob@xxxxxxxxxxxxx; Chrysler300@xxxxxxxxxxxxxxx; LabLoverDC@xxxxxxx Subject: Re: [Chrysler300] 300F Shannon and all, Tires will deteriorate with age, running down the road or sitting in a garage. Doesn't matter if the tires are radial or bias ply. So, conservatively after 6 or 7 years high speed running might not be advisable. Tires with wide white sidewalls are either tires produced in the last few years or some goodies that have been stored for many years. From experiences (and stories from this group) I do not consider either wide white acceptble for anything close to performance driving. The tires on my 300 were Firestone 500's and a good performance tire in the day. I have not seen any bias ply tires available today of that type. Is there a speed rating on reproduction tires? Radial tires we run today are speed rated. There are some available rated sustained 100+ but most are 90 MPH rated with a lot of light truck tires shown at 75 MPH. Engine coolant and brake fluid are pretty much OK but for engine oil, transmission oil and tires, the original specification recommended replacements are just not available. Warren Anderson Sedona,AZ [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: Chrysler300-digest@xxxxxxxxxxxxxxx Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/