Re: [Chrysler300] 300C front-ends and radial tires

[<smopar@xxxxxxxxxxxx>]

> I find it hard to believe that radials contribute to early frame failure.  Radials generally have softer sidewalls that should lessen the shock transmitted to the frame compared to the stiff bias ply sidewalls.  I would expect that your car must have fairly high mileage accumulation or perhaps spent too much of its life with imbalanced tires that could lead to fatigue failure.  I am assuming there are no corrosion issues.  Then again, the 57s never had much structural robustness to begin with - which can't help, even on the hardtops.  
Steve Albu

> From: "L.Andrew Jugle" <lajugle@xxxxxxxxxxx>
> Date: 2004/10/07 Thu PM 08:44:22 EDT
> To: Chrysler300@xxxxxxxxxxxxxxx
> Subject: [Chrysler300] 300C front-ends and radial tires
> 
> 
> 
> 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
> 
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