Ok,I'm going to hypothesize here, ( but then again, you sort of asked....) I don't see the relationship between whatever sort of tire you happen to run and "transmitting shock to the frame" when by design, all four of the tires and wheels are somehow supended by an apparatus designed to move up, down and *absorb* shock. Then again, I'm no mechanical engineer and that's just my gut reaction to this. Anybody else want to chime in? I've ran radial tires on not so modern cars for 25 years now and have never heard or seen of such a thing. But then, that's just me! Best Regards to all, Thomas F. Miller 300C, 300M Spec. tfm@xxxxxxxxxxxx >>> "L.Andrew Jugle" <lajugle@xxxxxxxxxxx> 10/7/2004 8:44:22 PM >>> I ran Sears/Michelin radials on my white 300 from 1972 to 1987 (same tires) for about 30,000 miles. Was careful about alignment. First guy to align car warned me, "The radials transmit shock to the frame". That set of tires met demise by tread separation (shortly after 120 MPH plus run at Chrysler Proving grounds) and Sears allowed "tire failure" with 2/64ths tread wear. I had my choice of any tire Sears stocked at time as warranty adjustment. When I bought second car in '76, it had shiny bald original bluestreaks on car. Replaced them with radials and proceeded to put about 40,000 miles on chassis. By the mid 1990's BOTH cars developed frame cracks and sagging. The frame shop that welded up both cars attributes failure due shock that radials transmit to frame. White car both sides were cracked, "Crime Story" black car had only passenger side go, that side which takes more pot holes and abuse. (Not to mention stunt driving in Las Vegas.) Anyone else experience frame cracks and sagging on 300C converts?? How many miles of radial use?? L. Andrew Jugle, Elmhurst,IL To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm Yahoo! Groups Links ------------------------ Yahoo! Groups Sponsor --------------------~--> Yahoo! Autos. Everything you need to know about buying or selling a car. FREE Quotes, 360° Tours, Research, Blue Book, Compare Vehicles, Buy Used http://us.click.yahoo.com/kEZsdA/bwnGAA/YiGOAA/8LmulB/TM --------------------------------------------------------------------~-> To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> 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/