Beating a Dead Horse - Tire Aging

[takepride]

Here's an exposé on the aging tire issue and comments from experts:

http://abcnews.go.com/Video/playerIndex?id=4826897

I'm a believer, as some may recall my posting of a tire split on a tire with arguably another 25,000 miles left on them.

Sorry to beat a dead horse, but if it saves even one injury..............

[Rick Coleman]

I have heard many opinions about tire replacement. They range from 5-7 years, regardless of mileage and visual inspection. What are Alpiners doing? At what age?

[dshogman]

I just replaced tires in June. According to dates on original tires they all were just over 6 years old. Went with Michelins.

[Jim A]

I had several tire issues with my previous Class C motorhomes with tires around 5 years old. I replaced mine at a little over 4 years old, a little earlier than desired due to a then upcoming long trip. Even buying the more expensive Michelins, the peace of mind was worth the cost of 6 tires.

[jerry davis]

Replaced my original Toyos this April with 25000 and 4+ years on them. They still looked new but I just didn't trust them and their low weight rating. Installed G670's and love the new ride and feel.

[Jim & Ingrid McIntosh]

We replaced our Toyos w/G670s this summer. Had approximately 56K miles and a little less than 5 years on our original tires. So far, we're pleased w/the G670s - better ride and weight rating.

[Rick Coleman]

What size Goodyear G670's are you all using?

[jerry davis]

295/80/22.5 and I can't tell any spedo difference from the original Toyo's. If there is a difference it is really negligible.

[takepride]

I noticed the needle now indicating 52 while actually traveling 55. It was exact with the Toyos, prior to changing to 670s.

[Jim A]

I believe EngineerMike said elsewhere on this forum that there was a tire size setting in the engine control module that could be changed by someone with the right hardware/software. That would correct the speedo for the slight change in tire circumference.

[Rick Coleman]

Quote:

Originally Posted by takepride I noticed the needle now indicating 52 while actually traveling 55. It was exact with the Toyos, prior to changing to 670s.

I believe that means the new tires are slightly larger.

[jerry davis]

Pride,

My observations were more on the ratio of engine RPM/speed. There seemed to be almost no difference. There might be a MPH or so difference but on my coach it just doesn't seem to be much more that 1 MPH. I certainly can live with it.

EM said in an earlier post that he had a pigtail that would enable him to return the odometer to an exact reading if it were off significantly.

[Ted III]

I imagine EM is pretty cute with a pigtail.

[Tom and Patty]

11r22.5 approx 41.3" 503 revolutions/mile (rpm)

295/80r22.5 approx 41.6" 499 rpm

.726392251% taller, EM with his pigtail had better check my math

Off topic, but talking about a dead horse, check out this link. Be sure to read about the bowling ball


Untitled Document

How to read load range tables

http://www.bridgestonetrucktires.com...v5iss1/ra8.asp