2 months ago wee bought a 91 Barth Breakaway. 28 feet long.
We discovered that there are 2 different size tires on the coach. There are no RV tires (new) for sale here.
So, our question is, what size tire is appropriate for our coach?
Any help would be very much appreciated.
Thanks in advance,
Tom & Gloria

You almost certainly should have had 8R 19.5 original equipment. This might help:
http://www.goodyear.com/rv/gen...conversionchart.html
http://www.rv.net/forum/index....ead/tid/18991053.cfm
http://www.rvnetwork.com/index.php?showtopic=80220
http://www.goodyear.com/rv/pdf/rvbrochure.pdf
http://www.rversonline.org/97ConfSuspension.html
http://forums.motorhomemagazin...ead/tid/25062937.cfm
http://ssl.delti.com/cgi-bin/r...KW&suchen=View+tires

Original tire size will be listed on the Data tag that is probably mounted on the wall over the driver's seat. Also would you please take a picture of that tag and post it here for our project.

Nick

quote:

Originally posted by Gloria Masters:
2 months ago wee bought a 91 Barth Breakaway. 28 feet long.
We discovered that there are 2 different size tires on the coach.

What are the sizes and what is where?

Here's a copy of the data card.
Thank you for all the helpful info

Thanks for posting the data tag, Gloria.
I think Bill just meant what size is on sidewall of front tires and rear tires. If you have metrics on the steering tires and old 8R's on the duals, that is not awfully bad.
I hope the links I posted are of some help to you. It was about two years before Dr. Yale passed away when he had the new Goodyear 8R 19.5 model G647 tires installed on the Breakaway we have now. I wish he had gone with the new G670 style in metric, low-profile sizing. There are not a lot of miles on them now and the sidewalls are still excellent. So, I do not anticipate buying tires for quite a while. Fortunately, the Goodyear Wingfoot shop in Lansing, MI was able to eliminate our terrible vibration. They put the tire with a .150" flat spot on a rear wheel where its mate minimizes the affect it has.
FYI... in case you have not seen it yet, there is a Breakaway brochure in the documentation available at the site. I note that you have the 28BS 1B floor plan. We have the 30BS 6B.
http://barthmobile.com/eve/for...31087061/m/711106482

Remember that it is best to replace RV tires in the 7-10 year range, regardless of mileage. Most RV's will never get anywhere close to reaching maximum rated mileage on a set of tires, and are more likely to fail from internal breakdown. The best way to prolong them is actually to DRIVE on them which circulates the rubber compounds, keeps them pliable, and prevents dry rot as much as possible.

quote:

Originally posted by scottydl:
The best way to prolong them is actually to DRIVE on them which circulates the rubber compounds, keeps them pliable, and prevents dry rot as much as possible.

You betcha!. I have seen tires go a very long time when driven often. The few failures I know of that were not from underinflation were all on vehicles that sat a lot. Not only does sitting deprive the tire of what you mentioned, it distorts and stresses the bulging area over a long period of time. Rubber hates to sit.

Our airliners had to be exercised regularly when they sat for any amount of time. Otherwise, they developed leaks everywhere there was rubber.

Even in light aircraft, we had customers whose planes got weekly runup and taxi exercise. They were happier airplanes than those that sat for weeks at a time.

This information from Goodyear is quite comprehensive.
http://www.campingworld.com/tips/rv-tire-care/45

It confirms what Scotty said:
"Each Goodyear RV tire contains additives, and as the tire rolls, they rise to the surface of the rubber to help protect the tires from cracking."

The manufacturer is very vague in the final paragraphs of the page as to RV Tire Service Life.

Gloria, although there are three Costco warehouses in Albuquerque NM, they might not offer 19.5" tires. I tried the tire size selector at Sams Club, seeing that there is one in Santa Fe. I could enter the right size, but could not get a response showing them available.