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Old 05-10-2014, 06:17 PM
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Tires and towing

I bought a new 2014 F350. I lifted the truck right away, 4" and put on a set of 20" wheels and nitto Trail Grappler 295/65-20. I put the tires on and towed the same day with HORRIBLE results. The truck was all over the place in the rear end. the trailer is an Attitude 23AK, 23' Toyhauler. The trailer was loaded EXACTLY the same way it was when I towed it with my stock F150. the F150 drove straight and true, it was just too much weight for it day to day. The trailer in this case was at about 8500lbs on a mild windy day. We also just bought a nice 28' Race trailer and the truck did the same thing. trailer was empty and the nose was just a little down when hooked to the truck. 2 trailers, Exactly the same feeling/issues. It feels like the back end is on ice and sliding around. Rear tires are at 80psi per spec.

My question is, has anyone else had issues or experience with a bumper pull trailer and these tires?

I have the stock 18's sitting in the shop, so I think I will have Discount tire put them back on then do a test pull. I think I has to be the tires.

The lift is a 4" BDS lift with basic fox shocks all around. The stock rear blocks are 3.5" and the lift blocks are 5". I have a very hard time thinking they affect anything. The front was springs. Everything on the suspension check out tight. I bought a Rear sway bar for it after towing the first time, and that made no difference on towing.

I really need some help here as I need to tow for work, but this truck won't tow for crap. there are Very limited tires with the load rating for the F350 in this size, so I might just go back down to stock size where there is more selection.

Last edited by Rap_Rider; 05-10-2014 at 06:21 PM.
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Old 05-10-2014, 06:21 PM
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This the truck hooked to the new trailer...


Truck hooked to the toyhauler.


Just the truck
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Old 05-10-2014, 07:18 PM
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Do you have a WD hitch on the new trailer????

My F-250 pulling a 28ft Keystone used too handle like crap until I found the Keystone RV forum and found out that the WD hitch was set up incorrectly, now that I have readjusted the hitch it tow's great. The rear end felt like what you are describing, now it's straight as an arrow.

It looks like in the one photo the trailer is nose down and the nose is high, your truck/trailer looks like a "V".
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Old 05-10-2014, 07:42 PM
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the red trailer is new to us (shop trailer) and has no weight hitch set-up on it, it was just sitting on the hitch I use for my toy hauler. I do think the nose needs to come up and I will check that out when we get a hitch set-up for it soon.

The Toyhauler was a little nose high, and I had to get a new drop shank to be able to drop it down. I haven't towed the Hauler since I got the shank, but with how the race trailer towed I don't think that was the issue.

To set-up the weight hitch I measured the front fender with the trailer off the ball, and then measured with it on the ball. Then lifted the trailer up and adjusted the weight bars so the front fender was centered. The front doesn't move that much with, or with out the trailer really, only about 3/4".
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Old 05-10-2014, 07:52 PM
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I'll say a lot of ppl have mentioned that feeling with the tires and no trailer. When I first put them on the truck by itself felt like it wandered as if the knobs on the tires were to soft. It took some miles but the feeling went away. I think that has been the consensus from what I have read online. Basically a little squirely at first but it wears off with some use.

belzfone
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Old 05-10-2014, 07:57 PM
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Maybe I should go smoke the tires a little and wear them down. Give them a couple heat cycles like a road race tire.

I have seen a lot of people talking about the tires and knobs, so that is why I think it's this also. The truck only has 2200 miles and about 800 of them on these tires. I should be putting some miles on it in the next couple of months, but I don't have much time with discount tire if I want to get the tires changed on their dime.
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Old 05-10-2014, 07:58 PM
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With my truck I set the WD so the front fender returned too almost the exact same height then went to the scales. I will say thou when I towed the 28ft equipment trailer for my kids school marching band if we didn't load it just right it would tow kinda bad, so we reworked some of the equipment/instruments so that it towed better. It was like playing the weight game, too much weight in the back towed all over the place, moved some stuff around, and bingo towed better.
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Old 05-11-2014, 07:52 PM
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What the heck is that buggy behind the truck in the last picture? Sorry this is off subject.
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Old 05-11-2014, 09:07 PM
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lol, I am not offended by being a little off topic.

That buggy is a RZR 800 with no plastics or cage. I own GTP Off Road in Las vegas and we work on RZRs and ATVs. Our shop was full and it was outside waiting for parts while we worked on other vehicles.
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Old 05-11-2014, 09:15 PM
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I dropped the pressure in the rear tires yesterday to 65psi from 80. I was surprised that the sensors didn't go off but I wanted to test it out. didn't tow today, but I think I will try and tow again tomorrow for a test and see if that helps. If not, I plan to test the stock tires, other then that I just don't know.

I hope that it's not the steering as I don't know how I would fix/change the alignment of the trackbar and steering. They are not parallel for sure. I did notice some manufacturers sell straight track bar, and that would make the alignment much worse. I just don't know, but my F150 towed my hauler much better. It just didn't have the power or brakes for it.
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