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Old 12-04-2019, 05:32 PM   #1
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New tires

Hi, My name is Doug Kirk. I joined this site a couple months ago thinking I would just monitor the discussions for useful information. Seems I now have need of some expert advise.
Im towing a 2015 Wind River 250 RDSW with my 2011 Tundra. Tundra specs towing capacity at 14,000 lbs. I weigh in at 14,100 pretty much loaded for travel. I have a weight distribution system and sway control. Once a got them dialed in it towed very nicely. The only thing that has changed is new tires.
I just bought, and had mounted, four new Falken Wildpeak A/T3W tires LT 265/70 R18. With these new tires I am getting a lot of instability. The tires spec 80 psi and I am towing with them at 70 front 75 rear. I drive at about 65 mph and get buffeted around by even the smallest of vehicles even with the sway control tightened pretty tight.
The trailer sits about 3/8 lower in the front, as measured from the frame, than in the back. Front wheel wells are an 1/8 to a higher with weight distribution in place.
Is there anything I can do to stabilize the rig short of buying new tires?
I would truly appreciate any advise.
Thanks,
Doug
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Old 12-04-2019, 05:37 PM   #2
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Are these an aggressive tread pattern? If yes, thats likely your problem.
New tires can cause all sorts of issues until their broken in.
Now, to your main issue. Too much trailer for your Tundra.
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Old 12-04-2019, 06:37 PM   #3
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Quote:
Originally Posted by 450Donn View Post
Are these an aggressive tread pattern? If yes, thats likely your problem.
New tires can cause all sorts of issues until their broken in.
Now, to your main issue. Too much trailer for your Tundra.
How can you say for sure thats too much trailer?
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Old 12-04-2019, 06:50 PM   #4
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Looks like the trailer gross is 9k, so I guess the truck weighs 5k. I will also say that new tires are terrible for a while until they wear in a little.
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Old 12-04-2019, 07:10 PM   #5
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Quote:
Originally Posted by dougkirk View Post
Hi, My name is Doug Kirk. I joined this site a couple months ago thinking I would just monitor the discussions for useful information. Seems I now have need of some expert advise.
Im towing a 2015 Wind River 250 RDSW with my 2011 Tundra. Tundra specs towing capacity at 14,000 lbs. I weigh in at 14,100 pretty much loaded for travel. I have a weight distribution system and sway control. Once a got them dialed in it towed very nicely. The only thing that has changed is new tires.
I just bought, and had mounted, four new Falken Wildpeak A/T3W tires LT 265/70 R18. With these new tires I am getting a lot of instability. The tires spec 80 psi and I am towing with them at 70 front 75 rear. I drive at about 65 mph and get buffeted around by even the smallest of vehicles even with the sway control tightened pretty tight.
The trailer sits about 3/8 lower in the front, as measured from the frame, than in the back. Front wheel wells are an 1/8 to a higher with weight distribution in place.
Is there anything I can do to stabilize the rig short of buying new tires?
I would truly appreciate any advise.
Thanks,
Doug
1st off, that's a lot of weight for a Tundra or any other 1/2 ton truck. The frontal area of most travel trailers is likely more than the truck is designed for.

Those tires are quite knobby and aggressive. Typically, those style tires are not great for towing, especially when at or past limits. Are the tires and wheels the same size as what you've towed with before? If nothing else has been changed and 80 psi to the rear tires doesn't help the tires are a poor match. That said, we don't know scale weights on truck and trailer axles. It could be a proper weight re-distribution of cargo could help as well.

For sure a heavier truck would help.
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Old 12-04-2019, 07:16 PM   #6
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Originally Posted by dougkirk View Post
Tundra specs towing capacity at 14,000 lbs. I weigh in at 14,100 pretty much loaded for travel.
Are you referring to the combined weight of the truck and trailer or just the trailer?
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Old 12-04-2019, 08:32 PM   #7
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So far only one number has been given and you are over it. There are MANY numbers that need to be considered when towing and I'm getting the feeling you aren't aware of them.... or, are holding your cards very close to you chest for some reason.

The 14,000# is likely the GCWR which is based on what the truck can PULL. What can it CARRY? Payload? Axle ratings? GVWR? Lots of information and education needed. Overall, I agree with the others that you have too much trailer for that truck.
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Old 12-04-2019, 08:38 PM   #8
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Thank you for the speedy reply. It is an aggressive tread pattern and my first set of all terrains. I will deal with them until they break in.
Thanks again
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Old 12-04-2019, 09:59 PM   #9
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Looking at Falkens websites show they have a large lug and void which can have lots of tread squirm. They should settle down after a few thousand miles.

My only other thoughts is most 1/2 ton truck wheels aren't rated for those higher 70-80 lb pressures. I sure wouldn't pump them above their psi rating. Usually what happens to a wheel is the bead seat may split especially with heavy loads and the wheel has had lots of duty cycles.

You might also try a lower psi in those big load E tires. My 2500 Dodge/Cummins has LT265/70-17 E tires.
My rear axle load is around 5400-5440 lbs towing a 11200 lb 5er. I find 70 psi works best with this load.
I would weigh the trucks front and rear axles and try pressures from the tire mfg load pressure charts.
To much psi can leave the tire rolling more on the centers which can cause handling issues.
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Old 12-05-2019, 08:02 AM   #10
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Thank you JIMNLIN, that is very helpful, I am getting what feels like squirm, good analogy. I will try different psi and will check axle weights. I did use the chalk method to find the best pressure without trailer. I will try the same thing with trailer attached.
Again, thank you, that was very helpful.
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Old Yesterday, 09:11 AM   #11
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I have the 20" wildpeaks on my ram and they are quiet and handle great and tow fine..I dont have the lt's so the max psi on mine is 51#..the door sticker says 32# but I run with 36# and put 40/42 when towing. those lt's should be quite a bit stiffer than the the wildpeaks I have but it sounds like you are pulling too much wt.. my nephew pulled a 32' 8500# trailer with his '16 Tundra and said it felt pretty maxed out.
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Old Today, 01:26 PM   #12
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Quick Google search shows the max tow for a 2011 Tundra to be 10,400 lbs.

No worries your only 4000 pounds over max. Oh I forgot the Tundra can tow the space shuttle.
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Old Today, 03:01 PM   #13
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Quick Google search shows the max tow for a 2011 Tundra to be 10,400 lbs.

No worries your only 4000 pounds over max. Oh I forgot the Tundra can tow the space shuttle.
Now go take a couple minutes and please reread the thread.his gross combined is 14100, not the trailer.
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