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Old 08-22-2007, 10:00 AM   #15
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Quote:
Originally Posted by altamont
I went down to my local Americas Tires Company and they said that trailer tires (ST's) were good up to 118 mph!
Probably meant to say 118kph !
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Old 08-22-2007, 10:26 AM   #16
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I think TB nailed it. Control is the answer. Although I personally do not plan to drive on interstates, if and when I have to, it is no faster than 55-60. I prefer the back roads and enjoying the views at 55 mph.
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Old 08-22-2007, 11:10 AM   #17
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As has been said already, it ain't the spped you CAN go, it's the control you have and your ability to stop and to maneuver safely. I try to limit my speed to 65 max. After a while, you get used to having just about everyone else blow your doors off. It's your life and property you're protecting. We've all seen too many rigs upside down in the median and jack-knifed because the driver was going too fast. Don't take unnecessary risks.
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Old 08-22-2007, 11:15 AM   #18
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Quote:
Originally Posted by altamont
I went down to my local Americas Tires Company and they said that trailer tires (ST's) were good up to 118 mph!.. so who is right?
clearly 'they' is wrong on all counts...

's' rated passenger car tires are rated to 112mph
't' rated passenger car tires are rated to 118mph

Tire Tech - Speed Rating, Load Index & Service Descriptions

'st' tires are designated 'special trailer' tires...

the industry norm is that st tires are load rated at 65 mph....

Trailer Tires - Tips and Advice by Auto Media

visit the g/y site for a little more reading and info...

On The Wings of Goodyear | RV Tires - Tire Selection - Marathon®

http://www.goodyear.com/rv/pdf/marat...nfo_032806.pdf

cheers
2air'
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Old 08-22-2007, 01:04 PM   #19
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Quote:
Originally Posted by altamont
I have heard that 65 mph is the highest speed safe for towing our baby. However, the tires are rated for much higher speed and the TV is very capable. Can 70-75 mph on level interstate pushing our limits? I seem to be passed by just about everything being towed.
Though you will see 65 or 75 on a sidewall, if you look at the tech specs for trailer tires they are actually rated for speed at load and pressure. For example:

Goodyear ST 225/75R15s are rated at 2540lbs at 65MPH at 65PSI.
Or 2270lbs at 75MPH at 65PSI
or 2150lbs at 65MPH at 50PSI and so on.
My suggestion would be at 10% below the rated load if at all possible.

As for what speed is 'safe' it depends on your circumstances, tow vehicle, and trailer. Generally speaking, it is safest to be in the flow of traffic in the slow lane (at least up to 75MPH). With no traffic I tow at 65MPH.
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Old 08-22-2007, 01:18 PM   #20
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I kinda think that if you are wondering whether you are at a safe speed or not....

Pat
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Old 08-22-2007, 01:29 PM   #21
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Having picked up a $200 ticket last week, I have been thinking about speed limits more than usual. The next day while driving through the same area - at the speed limit - I infuriated a porsche behind me who obviously wanted me to go much faster, until he could finally get around me. It's a tough call, you either have idiots driving stupid around you if you go to slow - ie the posted speed limit - or you risk taking home a $200 ticket. I have a feeling the $200 ticket wouldn't have been nearly as inconvenient for Mr Porsche as it was for me!
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Old 08-22-2007, 01:55 PM   #22
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As I always tell my wife...do not let the idiot behind you dictate how you drive your car.
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Old 08-22-2007, 02:21 PM   #23
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One of our buddies, formerly an Royal Canadian Mounted Police officer, surprised us when we started to travel with them and since then we know what to expect. He seldom goes more than a few mph over the speed limit. Knowing he's had a lot of driving training in all situations, and that he's also put a LOT of miles on, we asked him one evening if he exceeds the posted limit.

His response basically was that he'd spent too much time dealing with the results of people over extending their own abilities, their vehicles, or the road conditions, to push the envelope himself. It's as often the passengers and third parties who are dealt significant issues to deal with and he just won't go there.

Frankly, that slowed me down. Yep, I have cars that can easily exceed double the speed limit and easily just seem to come alive at 75 to 90, but it doesn't mean I'm about to do it myself. It took me a long time to realize I don't really need to. Since I've learned to slow down, so has life. I'm not feeling as much that life is going so quickly that I have to do everything in a hurry. The journey is far more pleasant, less stressful, I notice things on roads now that I'd missed in my "hurrying past" days, and I get to where I'm going a lot calmer and less frustrated. 55 to 65 works, it keeps the rigs within the comfort zone of almost everyone's driving ability as well as the TV and Trailers comfort zones, and a holiday stays that way.

I hadn't intended this to sound like a sermon. (I'll give myself a self disciplining smack on the back of the head in a moment). I just hate seeing the remains of a car/trailer after one gets away from someone. You just know that many hearts are going to hurt for a long time.

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Old 08-22-2007, 03:01 PM   #24
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These days I put the cruise control at ~64 MPH. The trailer stays straight when the 18 wheelers pass and the truck gets better MPG (average in 13 MPG range towing). I am also obsessive about truck and trailer tire maintenance.
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Old 08-22-2007, 03:27 PM   #25
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In the RV world there seems to be two discussions that merit as much controversy as religion and politics and currently they are both topics of discussion on this forum...again. They are 1) towing with the fridge on vs. off; and 2) towing speed.

I find it hard to justify excessive speed on the public highways and interstate systems whether towing or not. That doesn't mean I don't occasionally exceed the posted speed limit. When I do, it is never by more than 5 MPH and I never exceed 75 MPH on the interstate, especially when my kids are in the vehicle with me. Is it a good idea to drive 75 MPH on the interstate while towing? no. Is it acceptable? I think it depends on the conditions. I think it is safer to go with the flow when the interstate isn't crowded than it is to become a road hazard. When the interstate is crowded, I think slower is better.

My philosophy is that there are two types of RV'ers: there are the "getting there is half the fun" types; and there are the "I like to camp but I hate to drive" types. I fall into the latter. (BTW, my wife has always been prone to car sickness so as a child she developed the habit of sleeping in the car so having her drive is out of the question, she falls asleep at the wheel.) I get way more stressed about how long it is taking to get there and we should have been there a half an hour ago than driving an extra 5 MPH stresses me out. I also prefer to leave early in the morning when I'm fresh and avoid as much traffic as possible and get there as early as possible.

Consider this, 5 MPH on a 400 mile trip will save you more than half an hour of drive time. That last half hour is the most fatiguing. You avoid that last half hour of driving fatigued and you arrive much less irritable and you spend half an hour less behind the wheel driving in an irritable mood. So is it better to take roughly 6-1/4 hours to travel 400 miles at 65 MPH or add 5 MPH and get there in roughly 5-3/4 hours at 70 MPH.

In the end, you will have to decide what speed you are comfortable towing at. Just make sure you do as Silverback says he does and make tire maintenance a major priority no mater what speed you decide on.
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Old 08-22-2007, 04:27 PM   #26
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Two parts to this conversation and a third possable thing to help your tires.
First when I was a young man they put you in the most dangerous place in the milatary cause your young !and in a hurry. But as one gets more mature the need for speed and its traveling companion danger fades away.
The second is how comfortable we are driving at high speeds because of safty glass airbags etc. . There a joke if you get into somthing serious, a real crap shoot.
The help our tires thing is the big "N" yep nitrogen. you can fill your tires with it at some tire sales places and it dosen't expand or shrink so it dosn't matter if you take a psi reading after driving on a hwy.. It dosn't seep through tires so you will have to correct tire psi much much less often. Ive had it in my truch for quite a while. I haven't put it in the Safari yet cause I haven't been where I could change it out. If anyone has comment on nitrogen I'm very interested.
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Old 08-22-2007, 05:03 PM   #27
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Nitrogen is the primary component in air. It does expand and shrink in volume with heat, just as any gas will do. The big advantage to nitrogen is lack of oxidation inside the tire. outside it still occurs. The other Nitrogen does not support combustion.
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Old 08-22-2007, 05:21 PM   #28
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Quote:
Originally Posted by altamont
I have heard that 65 mph is the highest speed safe for towing our baby. However, the tires are rated for much higher speed and the TV is very capable. Can 70-75 mph on level interstate pushing our limits? I seem to be passed by just about everything being towed.
i'm sure to raise eyebrows with this one...

in california i drive 64.

in arizona i drive 80.

in new mexico, i'm not even going to tell you...

(weather, road and traffic conditions permitting)

i however do leave massive room ahead of me to go faster.

it's a Hemi Dude...

Bob (friend of K.)
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