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Posted 31 May 2012 - 07:22 PM
While on the surface this might seem to be a reasonable approach, there are a few things that need to be considered.
First, unless you have a TPMS that warned you that one of your duals was loosing air, in all probability you have no idea how long you drove with one dual underinflated. If you don't know when the tire started to loose you also have no idea at what speed you drove on one underinflated tire and also on one overloaded tire.
If a tire looses more than 20% of its air it is considered to be "Run- Flat" by tire industry
If you have driven on a "flat" tire it is considered to have been damaged and should not be considered for future safe usage.
What is not obvious when you read the above is that is one tire of a dual goes flat the mate has now been overloaded. I covered some of the info in a post on the Special Considerations for Duals, but there is more that needs to be considered.
If you have one tire punctured and loosing air the mate is "taking up" the load for both tires until it is 100% overloaded. Driving at highway speed will do serious internal structural damage. Most of which cannot be seen with out special equipment like X-Ray so it is simply considered scrap so now you need to replace two tires.
Trying to "limp" means that you need to reduce your speed and according to the special tables in Tire & Rim Association for adjustments for speed, inflation and load your limp speed is not 30mph or 20 mph or even 10 mph but it is limited to 2 mph. That is TWO miles per hour Maximum. Any more and you are damaging your tire beyond repair.
The solution would be to call for service. I would only drive on a single tire for a hundred yards at most to get to a location where I could safely pull off the roadway.
Retired Tire Design and Quality Engineer (40 years experience).
Retired Professional race car driver.
Retired Police Driving Instructor.
Member, FMCA Technical Advisory Committee
Delivered Tire Seminar for RV owners & two seminars on Genealogy at FMCA Bowling Green 2009, Madison 2011 and Indy 2012
I am scheduled to present two seminars on RV Tires & Three on Genealogy at Perry, GA in March
and possibly Redmond in 2014
See my blog www.RVTireSafety.com and subscribe if you want notice of new posts.
Posted 31 May 2012 - 07:47 PM
Posted 01 June 2012 - 07:18 PM
Posted 01 June 2012 - 08:13 PM
Posted 02 June 2012 - 07:14 AM
Posted 02 June 2012 - 08:58 AM
Posted 02 June 2012 - 01:42 PM
Posted 04 June 2012 - 03:43 PM
Posted 05 June 2012 - 01:53 PM
Posted 05 June 2012 - 08:35 PM
You certainly can decide for yourself but no "inspection" after that amount of travel will give you any usable information.
I "drove" something close to 50 miles on 1 tire. The tires had 80,000 miles on them anyway so I had no concerns about the end result as I was going to replace them all anyway.
Posted 12 June 2012 - 10:52 PM
We limped in from Death Valley, had a great tire man in Pahrump change to the spare and we went on to Vegas. Never had any problem with the other tires. Replaced them all after 7 years, just for safety.
Warning: To avoid punctures, avoid turning around on a dirt road with a high berm. The rocks in the berm punctured the sidewall. It was our first trip out, and nowhere else to turn around...Now we know better.
Also, lots of RV'ers in the desert get punctures by driving over creosote bushes. Again, not a big bush, but the little branches puncture sidewalls....No, we didn't do that, we learned from watching others several times...
Posted 13 June 2012 - 11:02 PM
Posted 14 June 2012 - 06:01 AM
Also tagged with one or more of these keywords: tire failure dual, spare tire
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