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Old 04-11-2009, 04:56 PM   #15
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My experience with the 2500 and off road tires has been the same. I have a 2008. I purchased to optional larger wheels which only came with off road tires. A guy who works for me and who leased a 2500 at the same time, went with the smaller stck tires which only came with highway tires. Riding in his Suburban is a significantly different experience. Plan to change over to highway tires soon.
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Old 04-11-2009, 05:39 PM   #16
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There are different styles of off road tires. They all have somewhat blocky tread, but some much more than others, especially the bias ply ones. The Michelins are not as aggressive as many are. Yet, I've never had a Michelin, including the much less aggressive tread Cross Terrain that came on the 4Runner, that wasn't excellent in snow and slick, wet mud.

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Old 04-12-2009, 07:56 AM   #17
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What Gene said...

The LTX's are a very smooth riding quiet tire....

Remember if you change tire height have the ECM re-programmed.
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Old 04-12-2009, 11:55 AM   #18
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Bob, I've been wondering about reprogramming. This isn't as much of a difference as a different aspect ratio. An E range tire should have a few more millimeters of tread. I don't think it will make much difference. The Tundra odometer reads a little high lately, around 2 to 3%, and I'll check it against the mile markers when we take I-70 and see how far off it is with new shoes. When the OEM tires were new, the odometer may have been correct, but I don't remember if I checked. The new tires may be pretty close.

I may reprogram my brain if I can remember to check the mile markers, then remember after I drive 10 miles to look for the mile marker, then again at 20 miles, etc.

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Old 04-12-2009, 04:38 PM   #19
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Gene,

The 265/75/16 LTX are 31" tall, ECM was programed for 28". Now run about 300 rpm less at 60 mph. DIC mpg now more accurate.
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Old 04-12-2009, 06:28 PM   #20
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Bob, Are you posting on the wrong thread? Shouldn't you be at: http://www.airforums.com/forums/f463...-tv-50164.html

I think you're talking about Steve's tires, not mine which are on 18" wheels.

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Old 04-12-2009, 06:42 PM   #21
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Gene,

It's not the size of the wheel, it's how tall the assembly is. When changing tires it's a good idea to check tire height and re-program if needed.
It's much more likely that the ride concern discussed here is caused by the tires, rather than the auto-ride shocks.
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Old 04-17-2009, 02:13 PM   #22
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I did call Michelin as Howie suggested and I'm not sure the Michelin Man really knew what I meant.

I told him I ordered LTX A/T 2 Load Range E 275/65/18 tires. I explained I had a 1/2 ton '07 Tundra that would be maxed out at about 7,000 lbs. (actually 6,900, but I wanted to keep it simple). I said the manufacturer recommended 30 front and 33 rear with Load Range C tires. I told him the trailer weighed fully loaded about 7,000 lbs. (actually 7,300).

My questions were what pressure towing and not towing? He looked at the charts and did some calculating (I could hear him punching the calculator) and came up with 50 front and 55 rear. I found out he was talking about a 10,000 lb. truck and then he admitted he was guessing. I explained again it was 7,000 lbs and he re-guessed at 45 lbs. front and 50 lbs. rear.

This was not reassuring. I thought of calling Toyota but the people there can only read off a FAQ list and know little about anything otherwise.

This is a common problem when I ask "experts" and I seem to know more than they do. I have had to explain things to my doctor which has made me think I should go to medical school myself except I'd never make it through organic chemistry.

I am going to get the tires mounted today and will be curious what the guys in the tire shop say. Maybe I'll settle on a pressure that makes the truck level, but I'm not sure what level is. Maybe it's the top of the bed. But level is many different pressures including flat tires….

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Old 04-17-2009, 02:31 PM   #23
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Quote:
Originally Posted by CrawfordGene View Post
I did call Michelin as Howie suggested and I'm not sure the Michelin Man really knew what I meant.
My questions were what pressure towing and not towing? He looked at the charts and did some calculating (I could hear him punching the calculator) and came up with 50 front and 55 rear. I found out he was talking about a 10,000 lb. truck and then he admitted he was guessing. I explained again it was 7,000 lbs and he re-guessed at 45 lbs. front and 50 lbs. rear.
Gene
Sorry to see you took the step and got a moron. He did not need a calculater to read a chart. Before you call back go to the Cat scale and have your truck and trailer weighed. You are interested in the load on each axle, the divide by two, and that is the only way they can answer your question. If you call back and get a female you have the right person. In the many times I have talked to Michelin over the years she has the best knowledge of all and I have a higher than average chauvinistic coefficient.

If your trailer is riding level you can weigh the trailer and divide by the number of tires and be close enough to get the tire load. Level is far more important with an Airstream than other types of trailer because of the type of axle used.
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Old 04-17-2009, 06:23 PM   #24
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I had the tires mounted and they recommended 60 lbs. Drove the 35 miles home and the truck rode very smoothly, much better than with the Goodyears.

All the scales in this county have closed for good and on my way east in a week I don't have a clue where there are scales. I have to go to Grand Junction on Monday and maybe I can find a scale there. I can put the truck in the garage and that's the only place around here that is level.

To check the truck and trailer together, I have to wait until I'm at a campground with a level, wrenches and good luck.

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Old 04-17-2009, 06:33 PM   #25
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Any truck stop on the interstate will most likely have a Cat Scale. Remember you have to weigh while hooked up, not just the truck.

I know 60 lbs is overinflated because I only carry 55 in my Sub while towing a 34.
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Old 04-17-2009, 08:07 PM   #26
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Old 04-17-2009, 08:27 PM   #27
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What is your question?

If it is what is the picture of it was written by the same lawyer that is writing GMs bankruptcy plan. I hope his math is better in the plan.

8600 GVWR with 4180 on the front axle and 5500 on the rear. You do the math. Definition found here GVWR - Gross Vehicle Weight Rating - Definition of GVWR

Even if loaded to the max the front would be 50 lbs. and the rear just over 60 lbs.
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Old 04-17-2009, 08:35 PM   #28
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Question if it is what is the picture of it was written????

confused......do it your way.

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