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Old 06-20-2013, 06:47 AM   #1
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Opinions on 15" firestone transforce ht for 72 soveriegn

I am in a situation where I have to get some tires for my sovereign at the firestone service center.... These tires are 235/75r15 load range c which they list as 1985lbs .... Will these work without me having to buy 16" rims or 15" st tires

Anticipating my airstream will stay around 6000lbs loaded.... Oh and since I know nothing about tire sizes.... 235 fits ok? I have seen both 225 and 235 mentioned by folk.... I have original rusty steel wheels on mine 700 size tire on it now
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Old 06-22-2013, 06:13 PM   #2
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I don't recall anyone installing Firestone tires on an Airstream; at least, no one has posted regarding it.

Most seem to prefer Michelin LTX M/S or M/S2, which should be XL rated in 15-inch sizes. These are available at Discount Tire, Costco, Sam's Club and most major tire store chains.

Perhaps with this bump, someone with an older Tradewind will post their experiences with switching to 235/75x15 XL tires.

Good luck!
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Old 06-22-2013, 06:36 PM   #3
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Thankyou Phoenix, I will be going to the firestone store in a couple of days and see what they have and what they can order.... It may be difficult to stay 15" if I want radials..... Load rating seems to be the issue if c rating is not sufficient.... Regardless I will be either getting bridgestones or firestones thanks to a nice Aunt
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Old 06-22-2013, 06:47 PM   #4
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I have the Transforce LT in 16" on my tow vehicle. I really like them. The tires you are talking about putting on your trailer will fit, however they might be a little tight going on.
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Old 06-22-2013, 07:21 PM   #5
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I looked at Firestone and Bridgestone tires the last time I was at the Firestone Store. The only Firestone or Bridgestone tire they had that might work was the light truck tires. The store manager said they would not install LT tires on my trailer and they would not warranty them if they were installed by someone else.
They do have a ST trailer tire, an off brand from China. I bought and installed a pair on a utility trailer, to haul a 4 wheeler, with 1,500lb gross weight. I would not trust these tires on the Airstream.

edit: I have been using Firestone and/or Bridgestone on my tow vehicles for the last 15+ years. No problems.
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Old 06-22-2013, 07:30 PM   #6
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When using LT tires on a trailer to make up for the softer sidewall on the LT the weight rating should be reduced by 10%. For a trailer the tires you mention should be considered to have rating of 1785. This info came from a tire engineer who has worked for Michelin and currently works for Ford.
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Old 06-22-2013, 09:30 PM   #7
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We use Firestone TransForce HT 16" tires on our whole fleet of trucks and trailer. They are pretty good, not as good as Michelins, but less expensive than Michelins. We have a national fleet account with Firestone Complete Auto Care and get a discount on all services and it is direct billed. We do this because we have over 250 service technicians and tricks scattered all over the entire United States. These tires are the best compromise on price and quality.
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Old 06-22-2013, 09:31 PM   #8
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Old 06-22-2013, 10:54 PM   #9
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Quote:
Originally Posted by mercury7 View Post
I am in a situation where I have to get some tires for my sovereign at the firestone service center.... These tires are 235/75r15 load range c which they list as 1985lbs .... Will these work without me having to buy 16" rims or 15" st tires

Anticipating my airstream will stay around 6000lbs loaded.... Oh and since I know nothing about tire sizes.... 235 fits ok? I have seen both 225 and 235 mentioned by folk.... I have original rusty steel wheels on mine 700 size tire on it now
There is no requirement to derate LT tires when used on RV trailer axles. See the reference below.

Michelin, Bridgestone, Firestone, etc. consider the use of LT tires as replacements for Original Equipment ST tires to be a misapplication of their LT tires and will not provide any warranty coverage for such use of their tires. The second reference contains a current Michelin LT warranty.

Most tire retailers will use the “don’t ask don’t tell” method when replacing RV trailer tires. To confirm the misapplication statement you can call or send an eMail to the manufacturer of the LT tires you want to use as replacements. Provide the tire manufacturer with the tire information found on your trailer’s certification label/tire placard.

http://www.fmcsa.dot.gov/rules-regulations/administration/fmcsr/fmcsrruletext.aspx?reg=571.110

http://www.michelinman.com/mediabin/Approved/Michelin/Visuals/Digital/Owners%20Manual_Post_Promise_Plan.pdf

An after thought: When an RV trailer manufacturer uses LT tires as Original Equipment on some of their trailer axles it is not considered a misapplication.
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Old 06-22-2013, 11:26 PM   #10
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I'm currently running Firestone Transforce HT's on my Airstream. I am using 215/85R16's after upgrading the rims. I haven't had any problems over the last couple of years that they have been on. My Overlander was originally fitted with 7.00R15's.
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Old 06-23-2013, 06:35 AM   #11
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Quote:
Originally Posted by Al - K4GLU View Post
When using LT tires on a trailer to make up for the softer sidewall on the LT the weight rating should be reduced by 10%. For a trailer the tires you mention should be considered to have rating of 1785. This info came from a tire engineer who has worked for Michelin and currently works for Ford.
Al, that should still be with in the weight requirements..... The thing is it looks like this is my only choice unless I buy new rims.... Hoping firestone does not give me any lip
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Old 06-23-2013, 07:00 AM   #12
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1959 24' Tradewind
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Quote:
Originally Posted by m.hony View Post
We use Firestone TransForce HT 16" tires on our whole fleet of trucks and trailer. They are pretty good, not as good as Michelins, but less expensive than Michelins. We have a national fleet account with Firestone Complete Auto Care and get a discount on all services and it is direct billed. We do this because we have over 250 service technicians and tricks scattered all over the entire United States. These tires are the best compromise on price and quality.
I don't suppose that discount is transferable to Anderson sc is it lol.... I guess one of the first questions I will ask is how inexpensive a set of steel 16" rim would be.... Obviously I can get a better rated transforce ht that way.... Might even have the tire itself priced better..... Also I know you get the discount but what can I expect for repacking the bearings.... They will need to do this.... And are new bearings something I should consider on a 40+ old trailer
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Old 06-23-2013, 07:08 AM   #13
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Quote:
Originally Posted by bwoodtx View Post
I have the Transforce LT in 16" on my tow vehicle. I really like them. The tires you are talking about putting on your trailer will fit, however they might be a little tight going on.
BDWood, tight fit as far as width? 235 I know is wider but it seems by not two much..... I figured height would no be an issue because it is still a 15"..... It is my current understanding that if I get 16" I should go with 225/75
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Old 06-23-2013, 11:44 PM   #14
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The 15" Firestone Destination LE 2's (an LTX) that I put on a few weeks ago have essentially the same specs and dimensions as the Michelins, cost less, and are rated about the same or a little higher on the Tire Rack site. I'm very pleased so far -- but only about 1700 miles. My BFFs at Peerless thought they were a good choice. More to follow after a few seasons ...
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