Eureka, Solved Rear Suspension Noise

[LRGreger@aol.com]

I'd posted a help request recently to identify the source of rear suspension 
jarring when going over minor road surface gaps such as expansion joints.  I 
got some helpful advice, but before I was able to attempt any of the 
suggested fixes, I replaced my two rear tires.  Living in So. Calif., there 
is a tendancy not to pay a lot of attention to tread wear, and they were  
both essentially bare.  Low and behold, the jarring dissappeared with the new 
tires.  Apparently the treadless tires were causing a "slapping" action of 
the tire on the pavement.  I never would have believed it could have been 
true had a tire salesman had told me, but "seeing" (feeling in this case) is 
believing.  The only bad part is that I don't know why the tires (180 wear 
rating) wore out so quickly.  Previous similar ones had lasted 30,000+ miles. 
 These two were bare at 10,000 miles.  I replaced them with 300 wear rated 
tires.  Any thoughts?

Rob
88 80q