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Old 09-28-2010, 05:17 PM   #15
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There is no evidence to support that statement, only hearsay. If there was, the National Highway Safety Administration would have stepped in a long time ago.
Ahab,

You obviously do not read all the threads on this forum about trailer tire failures, and I submit to you that my friend who found two GYM's on his '07 Airstream with seperations this weekend, is evidence enough for me.

And, the NHSA couldn't care less about trailer tire failures because nobody's pink little body is riding in them.
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Old 09-28-2010, 07:29 PM   #16
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"the fact that people are continuing to have lots of trouble with "ST" tires" is not a fact. There is no evidence to support that statement, only hearsay. If there was, the National Highway Safety Administration would have stepped in a long time ago.
We don't know. And considering the performance of FEMA with KATRINA, or the MMS with DeepWater Horizon, I wouldn't lay any bets about the responsibility of the Feds just because the statutes or laws say they should.

My take on ST tires is that they are cheap (they are, in price), that they're meant to hold up to years of sitting around by design, as well as having a pretty decent weight rating If, in fact, they are REALLY the ideal choice, I'd like to see some reasonable proof . . LT tires look better on many counts.

To the OP: I quit buying PIRELLI tires years ago due to customer service after the sale (warranty). I'd be careful about that aspect with any brand, but especially so with this one.

tires for a trailer pulled by a passenger hauling vehicle has tires rated for only 65MPH.

This is not absolute. See the GOODYEAR Marathon .pdf. They are good to 75+ in some situations (pressure/load dependent).

Good luck.
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Old 10-08-2010, 01:47 PM   #17
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I see a lot of people saying LT tires are only for light trucks.
This is what is molded into my tire's.
"Goodyear 7.00-15LT Travel trailer Hi-Miler"
Just FYI.
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Old 10-08-2010, 02:12 PM   #18
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Government regs for speed, wear and temperature are for passenger tires, not LT or ST tires. Some LT tires have been speed rated, but I don't believe it to be required. Thus a manufacturer may state something, but whether it's accurate is not known.

Now some light trucks and SUV's come with P (passenger) tires and some come with LT tires. It may be that what was once called LT are now called P for some reason.

You have to look beyond LT, P, and ST to know what to do. Lots of info is on retailer websites and manufacturer websites about tires.

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Old 10-08-2010, 03:17 PM   #19
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Ok - every time these tire threads come up I get more confused.

Now my question -

If you do not like the GYM's because of the D load range and you want something to carry more weight, hence load range E, why not go with a load range E 15 inch tire and forgo buying 16 inch wheels? I do not mind putting money into my TT but it is not a bottomless bucket.

Safety should be a big portion of anything you do in life and buying tires for your beloved TT should be no excepton. Is it because the other tires are an unknown?

I found three different brands in a quick search showing 225-75-15 load range E. I know they will not carry as much as a 235-75-16 load range E but is the approx. 700lbs. difference (15's 2830 - 16's 3500) necessary. Isn't a load range E tire much more stiffer than a load range D? Airstreams want a soft ride (that is why there is so much written about the axles) and now when we get to the part where the trailer meets the road we stiffen her up. This is what gets confussing.

I understand, as it seems, that there are more problems with ST GYM's than other brands, IMHO it is because that, more than likely, there are more ST GYM's running down the highway. I don't know and I am sure this debate will be covered more and more as time goes on. But for what it's worth I have had my say.

I still do not know which tire I am going with but unless there is some very convincing data to back it up, I am going to stay with 15 inch wheels. Not the ones I currently have (originals I think) in the spring - new axles - wheels and tires. I will get off my box now.

Have a great Columbus Day weekend.
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Old 10-08-2010, 03:38 PM   #20
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Quote:
Originally Posted by mwells4654 View Post
Ok - every time these tire threads come up I get more confused.

Now my question -

If you do not like the GYM's because of the D load range and you want something to carry more weight, hence load range E, why not go with a load range E 15 inch tire and forgo buying 16 inch wheels? I do not mind putting money into my TT but it is not a bottomless bucket.
Almost all failures of the GYM's is not due to tire carcass failure (unable to carry the weight), it is because of tread seperation first, the tread being thrown off the tire, then the blowout.

Going to a load range E tire, would not help the problem in any way, unless you ran them at 80 lbs of pressure, and that would only make them run a little cooler. There are many people on here that won't even run the LR D's at 65 lbs because they want a soft ride.

I have a friend in our unit that recently had two Carlisle LR E's fail from tread seperation. I have another friend in our unit that recently found two, three year old GYM's with seperated treads on his trailer, fortunately before they failed.

The problem is, all ST tires are junk. That is my opinion, and I've been told the same thing by two different tire retailers. Then, one of them will not install anything but an ST tire if he knows it's going on a trailer because of liability reasons.

Our problem is as I see it, there are no LT tires made in 225/75 15 size. There are a couple of 235/75 15LT's made and a few 700/15, and one 7R15.

When my trailer tires need replacement next time, I will go to a 15" LT tire.
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Old 10-08-2010, 04:26 PM   #21
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It used to be easy to find 15" LT tires in all sizes, but since manufacturers of trucks and SUV have gone to bigger wheels, the variety of LT (or P) tires available has dropped. Some of us have converted to 16" wheels because we are Michelin fans and the right size tire is only available from them for 16". When you buy a 15" tire with a different aspect ratio, the dynamics of the tire have to be different, but someone else hopefully understands how to explain that.

As for hard ride, there are a couple of things to think about.

First, will you inflate a LR E tire to the max? Remember, the tires that come on your truck are often LR C and the recommended pressure is somewhat less than the max. The maximum (stamped on the side of the tire) is for heavier loads than normal use. You can look at the tables that tell you how many pounds of pressure is appropriate for the load. This is true for both the tow vehicle and trailer. Airstream recommends 65 psi for their 15" tires. On some trailers the tires are close to their capacity, on others, not. 65 seems to be close to accurate for most applications, but a more accurate number could be learned from looking at the tables for the tire. So, while all of my tires are LR E, none are inflated to the max because they don't have to be.

Second, different tires ride differently. Michelin engineers tires for a smooth ride and promotes that in advertising. My Load Range E LT tires ride better than the OEM Load Range C P tires that came on the truck.

How important are tires? Very, up there with brakes and steering. High quality tires cost a lot upfront, but last longer and do the job better. I think they are much cheaper in the long run than cheap tires.

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Old 10-08-2010, 05:55 PM   #22
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Originally Posted by SteveH View Post
The solution to our tire problems? A 235/75 15 LT tire in load range D.

Pirelli Scorpion ATR

It's called an On/Off road, all terain tire, but that mostly describes the tread design, and I wonder if this would in any way prevent it's use in trailer service.

Pirelli is a well respected tire manufacturer, it's an LT tire in load range D, so it should handle the weight OK, it's a 15" so no need to replace wheels. They are a little more expensive than ST tires, but who wouldn't be willing to pay a little more for a tire that would carry the weight and stay together?
I'll try bringing this up one more time. I'm using the Continental Vanco 2 tires, size 225/70R/15. These are D rated (110/112) 2470 lbs. at 65 psi. The only draw back (which I have no problem with) is the trailer sits 1/2" lower. There is also a Goodyear Cargo 21 tire that has the same specs. If you want to stay with the 15" wheels, these are 2 tires to consider. So far, they have about 5,000 mostly highway miles on them. I usually average around 76 mph. going down the highway
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Old 10-08-2010, 07:09 PM   #23
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Hi Steve;
I bought a set of Pirelli tires for a car in 1971 and they didn't last the summer, haven't had much faith in Perelli since. The tires you are looking at are nice looking tires, I think they would pick up a lot of gravel in the tread in parking lots and such. I think the LT tires are are the way to go if you are going to be using your trailer much. I am going to stick with the Yokohama's.

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Old 03-01-2011, 07:37 PM   #24
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I'll try bringing this up one more time. I'm using the Continental Vanco 2 tires, size 225/70R/15. These are D rated (110/112) 2470 lbs. at 65 psi. The only draw back (which I have no problem with) is the trailer sits 1/2" lower. There is also a Goodyear Cargo 21 tire that has the same specs. If you want to stay with the 15" wheels, these are 2 tires to consider. So far, they have about 5,000 mostly highway miles on them. I usually average around 76 mph. going down the highway
RLS,
I was wondering if you could tell me how long you have had the Contis? Are they wearing well? How many miles do you have on them? I am considering installing a set on my Ambassador. Thanks,
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Old 03-01-2011, 08:34 PM   #25
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RLS,
I was wondering if you could tell me how long you have had the Contis? Are they wearing well? How many miles do you have on them? I am considering installing a set on my Ambassador. Thanks,
Tires are doing great, still look new They were put on around the middle of 09 and now have around 7,000 on them. I do keep them covered when parked and also take the weight off of them if it's going to be parked longer than a month.
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Old 03-01-2011, 09:14 PM   #26
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I would urge owners in Souther states do as RLS does. Cover the tires! It goes a long way to preventing some of the cracks and damage Steve says in post 12.

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Old 06-22-2011, 10:13 PM   #27
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Quote:
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I'll try bringing this up one more time. I'm using the Continental Vanco 2 tires, size 225/70R/15. These are D rated (110/112) 2470 lbs. at 65 psi. The only draw back (which I have no problem with) is the trailer sits 1/2" lower. There is also a Goodyear Cargo 21 tire that has the same specs. If you want to stay with the 15" wheels, these are 2 tires to consider. So far, they have about 5,000 mostly highway miles on them. I usually average around 76 mph. going down the highway
My searches for tires brought me to the same place. I have a 1978, 25 ft. Traidewind that I purchased yesterday and there is plenty of room for any of these tires. I have already done measurements and read plenty of post from many of you guys prior to purchase. The question is. Are you willing to give up 1/2 in. of ground clearance with the 225-70-15? Or, go with a 10 mm. wider 235-75-15 than stock tire and remain at the same tire diameter as stock at approximately 29 in.?

There is the Perelli ATR load rated D, 2335 lb. @ 65 lbs. in size 235-75-15 There is plenty of clearance room on my 1978 25 ft Traidwind for the extra 10mm. Tire Rack list price of $142.00 The tire is made in Argentina or Brazil.

There is the Goodyear Cargo G26 Load rated D, 2470 lb.@ 65 lbs. in size 225-70-15 This tire is smaller in diameter and will lower the trailer 1/2 in. as stated previously. Tire Rack list the price at $209.00 The tires are made in either France or Germany.

There is also the Continental Vanco 2 Load rated D, 2470 lb. @ 65 lbs. in size 225-70-15 This tire is smaller in diameter and will lower the trailer 1/2 in. also. The Tire Rack list price is $131.00 and the tire is made in either Slovakia or Germany.

I will most likely purchase the tire that has the best availability. I will probably purchase from Discount Tire as they are a nationwide company and have the best prices. Also my truck tires were purchased from Discount Tire and there are benefits to having all your tires from the same tire dealer. Discount Tire's web page does not have great information, so I cross referenced with The Tire Rack and the tire manufacture.
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Old 06-22-2011, 10:48 PM   #28
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Quote:
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"the fact that people are continuing to have lots of trouble with "ST" tires" is not a fact. There is no evidence to support that statement, only hearsay. If there was, the National Highway Safety Administration would have stepped in a long time ago.
1989-2011 No problems with ST's

Cover.......

.... off in winter.
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