Duro Tires again

[Iggy]

I have read all the messages about the Duro tires here and decided to see how they run.
I just returned from a round trip from Phoenix Arizona to Branson MO. and back. (approx 2,700 miles) I checked my tire pressure before leaving and 3 or 4 times during the trip. 99% higway miles.
I set all tires at 50 psi.
I drove 65-70 mph most of the time on the highway.
Anytime I did a rest stop I felt the tire tread to see if they were running hot. They were cool.

I did see that 50 psi cold did increase to 52.5 psi on the highway which is normal. The tread is wearing evenly and at this time I plan opn keeping them.

I am not defending any tire or manuf. but it is super important to maintain the proper tire pressure at all times. (as other have said) If you do not and the tire gets low it will generate more heat from the rolling and road resistance and will prematurely fail. Bottom line.

[acadianbob]

If your tires are SL rated, they are not rated for 70 mph . . . .

[SaskCampers]

Some good info.

Trailer Tires 101

[lbrjet]

Same here although our trip was only 1200 miles. Duro 2100 radial. Were exactly 50 psi when we left and exactly 50 psi when we returned with morning readings at about the same temperature.

[Iggy]

Originally Posted by lbrjet

Same here although our trip was only 1200 miles. Duro 2100 radial. Were exactly 50 psi when we left and exactly 50 psi when we returned with morning readings at about the same temperature.

Hi Larry
At least we can say we did ok compared to Nigel.
Hope you and Janice made it home safely.

[Oakman]

I still have the original Duro tires on my Wildcat. We purchased it in 2007 and the tires still look great after more than 18,000 miles. I've read that trailer tires should be changed regardless of how they look after 20,000 miles or 5 years which ever comes first. I've been researching tires and I still can't decide whether to buy trailer tires again or get truck tires. If I put truck tires on the trailer I won't be limited to the 65 mph speed rating of trailer tires.

BTW, I always keep my tires inflated to the maximum pressure, even during the winter when the trailer is in storage. I check on the trailer every two weeks when it in storage.

[tommyowen]

My wildwood travel trailer will be a year old in 2 weeks. My duro tires that came on it had cracks on every tire all the way around. Duro cover under warrenty. They let me up grade to a d2100 radial for 20 a tire. These radials look a lot better. Duro did what was expected.

[sherdep]

dont want to Hijack but since we are tire pressure - the side wall on my tire say's 50 psi
when I checked the tire pressure on all 4 tires they are all around 37 psi - I have taken a few trips already since I picked my trailer up March 9th and never checked the tire pressure until this past weekend.

Should I keep them at 37 psi or should I put them at 50 psi?

Trailer is a 2011 Mini Lite 2306

[Iggy]

Originally Posted by sherdep

dont want to Hijack but since we are tire pressure - the side wall on my tire say's 50 psi
when I checked the tire pressure on all 4 tires they are all around 37 psi - I have taken a few trips already since I picked my trailer up March 9th and never checked the tire pressure until this past weekend.

Should I keep them at 37 psi or should I put them at 50 psi?

Trailer is a 2011 Mini Lite 2306

If they are the tires the manuf installed on the trailer. YES I would put them at 50 psi. as it reads on the tire.
I would check them every time you leave for a trip and never guess.
Good luck and glad to see someone listening.

[Iggy]

Originally Posted by tommyowen

My wildwood travel trailer will be a year old in 2 weeks. My duro tires that came on it had cracks on every tire all the way around. Duro cover under warrenty. They let me up grade to a d2100 radial for 20 a tire. These radials look a lot better. Duro did what was expected.

So what you said was that you had bias tires originally and upgraded to radials. Mine are radials.

[sherdep]

Originally Posted by Iggy

If they are the tires the manuf installed on the trailer. YES I would put them at 50 psi. as it reads on the tire.
I would check them every time you leave for a trip and never guess.
Good luck and glad to see someone listening.

I am listening and thanks for the info - its clear now - was kinda unsure cause never checked them before and I dont want to have any issues with the trailer
the tires I have are the Karrier Load Stars - let me know how the Duro hold up - when I am ready to upgrade I will spend the extra for the better tire

[Iggy]

Update July 12, 2011

I have over 10,000 miles on my DURO tires and have had no blowouts or leaks. As I said earlier I do check them more then most and maintain 50 psi all the time.

I have driven long distances in the blazing sun of Arizona and they are wearing evenly. I have cruised at 70 mph for many hours and they still are great.

I can not answer about others but I still think most people need to check cold tire pressures whenever you are travelling in the mornings. Did you know different altitudes change tire pressure? Yes it does.



2010 - 20 days camping
2011 - 43 days camping

[red.jimbo]

I really have no intention of hijacking this thread. But I see a lot of talk in this thread about 50 PSI and a maximum speed of 65 miles per hour. I concur that is the specification for ST trailer tires. But get a load of this memo from Goodyear.

Read the note on the lower right corner of the very last page: http://www.goodyear.com/truck/pdf/pr...Brochure_P.pdf

It says:
IMPORTANT OPERATING INFORMATION
Industry standards dictate that tires with the ST (Special Trailer) designation are speed restricted to 65 mph under normal inflation and load conditions, unless a different speed restriction is indicated on the sidewall of the tire. Based on industry standards, if tires with the ST designation are used at speeds between 66 and 75 mph, it is necessary to increase the cold inflation pressures by 10 psi above the recommended pressure for the load.

• Do not exceed the maximum pressure for the wheel.
• If the maximum pressure for the wheel prohibits the increase of air pressure, then the maximum speed must be restricted to 65 mph.
• The cold inflation pressure must not exceed 10 psi beyond the inflation specified for the maximum load of the tire.

Am I reading this right? It says ST tires are rated for 65 MPH at 50 PSI, but 75 MPH at 60 PSI. So, if you want to go fast, why not increase your ST tire pressure to 60 PSI? How can one say that 60 PSI is too much pressure for an ST-category when the manufacturer recommends it? (Yes, I understand that the rims must be rated for 60 PSI first.)

As for me, I sometimes get up to 70 MPH towing my TT. So, I run my ST tires at 55 PSI.

[onequicksportster]

I'm thinking of putting drag slicks on mine

[BigRed]

Didn't you answer your own question?? DURO tires are on most FR products. The tire's also say MAX pressure 50psi(at least my DURO tires say this).So I don't increase them even too 55psi. This is a GOODYEAR memo, not DURO. I would do as it says, if your tire states on the sidewall a MAX pressure of 50psi dont over-inflate the tire because of this memo.....it clearly states not to over-inflate your tire to get to the 60psi range (thus fast running speeds). DURO's are rated for a max pressure of 50psi...period !

[Fire Instructor]

Originally Posted by TheSasks

Some good info.

Trailer Tires 101

Link won't connect. It trys to go to TrailerLife site, which, I believe, is now "dead".

[red.jimbo]

Originally Posted by BigRed

Didn't you answer your own question?? DURO tires are on most FR products.

My FR trailer came from the factory with Goodyear ST tires.

Originally Posted by BigRed

This is a GOODYEAR memo, not DURO.

Correct. And the opening statement is "Industry standards dictate that tires with the ST (Special Trailer) designation...". Clearly Goodyear is referring to an unidentified standard for the ST tire, not their own design standards. Is it your belief that Duro doesn't manufacture their ST tires to industry standards? If your answer is yes, I would agree that this memo is not relevant to Duro ST tires.

Originally Posted by red.jimbo

I really have no intention of hijacking this thread.

In retrospect, I should have never posted this here. Sorry everyone. In an attempt to stay on the general subject of the thread....

Trailer tires must be fully inflated to their maximum pressure in order to hold their maximum rated load. If the tires are designed to industry standards, they will withstand measurable overpressure due to an increase in operating temperature. So, a tire inflated to 50 PSI cold that heats to 52.5 PSI after driving down the highway for a while is just fine. However, operating the tire in excess of 65 MPH does not appear to be advisable. unless of course....all right, I'm not going there. (Please see my previous post)

[phoneman06]

Originally Posted by BigRed

Didn't you answer your own question?? DURO tires are on most FR products. The tire's also say MAX pressure 50psi(at least my DURO tires say this).So I don't increase them even too 55psi. This is a GOODYEAR memo, not DURO. I would do as it says, if your tire states on the sidewall a MAX pressure of 50psi dont over-inflate the tire because of this memo.....it clearly states not to over-inflate your tire to get to the 60psi range (thus fast running speeds). DURO's are rated for a max pressure of 50psi...period !

Not all Duro's are rated for 50 psi. Some are rated at higher pressures. It depends on your ply rating. So yes, do what it says on your tire.
See link to Duro website.

Duro Tire

[MtnGuy]

Originally Posted by red.jimbo

Am I reading this right? It says ST tires are rated for 65 MPH at 50 PSI, but 75 MPH at 60 PSI. So, if you want to go fast, why not increase your ST tire pressure to 60 PSI? How can one say that 60 PSI is too much pressure for an ST-category when the manufacturer recommends it? (Yes, I understand that the rims must be rated for 60 PSI first.)

As for me, I sometimes get up to 70 MPH towing my TT. So, I run my ST tires at 55 PSI.

That is the way I read it, and that statement has been on their website for a while.....not just recent.

[Iggy]

My tires are ST225/75R15 6 ply, 50 psi. 2,150 lbs max load

Originally Posted by phoneman06

Not all Duro's are rated for 50 psi. Some are rated at higher pressures. It depends on your ply rating. So yes, do what it says on your tire.
See link to Duro website.

Duro Tire