Loose at high speeds

Anyone else having issues with what feels like loose steering at high speads (over 60 mph). It's not steering wheel vibration due to unbalanced tires - I know what that feels like and this isn't it. Having trouble maintaining my lane. Scarier at times than driving my old 27 ford with a modified I beam front end.

As far as modifications pertaining to this post: 20" rotiforms with Toyo open countrys
RPG 1.5 perch collars
Currently running steering in sport mode to try and keep it tight.
I did have an alignment after lift & rim install

not sure, but why would you put 20" wheels on an off road truck? serious question

DEGBTI,
Starbucks....

Eddie

Might be due to the weight increase from stock to the new set of wheels/ tires. MT tires will shift on uneven pavement and tend to wander if your not used to running wide/ large tires. Id check the Toe on the alignment and maybe look at adding slight positive caster. That will give the tires a more "on center" feeling at speed.

Sasha4 said:

Id check the Toe on the alignment and maybe look at adding slight positive caster. That will give the tires a more "on center" feeling at speed.

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This sounds about right. I'd check the alignment. Sometimes after leveling shops won't align/adjust the caster appropriately. If the caster is too low (not positive enough) the truck wander at highway speeds for sure. Had the same issue with a Tacoma years back.

alignment and look into adding some weight in the rear of the truck as well.

To be honest, the truck feels "unglued" to the road anytime in 75+.
I figured it was just the characteristics of the truck.

My C7 was my daily before the Raptor and just about everything else I drive feels like i'm driving a mattress. lol

My truck is just 2 mos old and I hit 100 mph for the first time yesterday. Yup, it was scary. It was like being on a flying carpet !!

ElRaptor said:

To be honest, the truck feels "unglued" to the road anytime in 75+.
I figured it was just the characteristics of the truck.

My C7 was my daily before the Raptor and just about everything else I drive feels like i'm driving a mattress. lol

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There are several roads on Texas with 80 and 85 MPH speed limits. I have not had issues with my 2018 SCREW up to 90+. It has been very smooth for long distances across the state. I am completely stock right now, but plan to add 37s, Geisers and Deaver +3s as soon as my parts arrive.

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Cropdoc said:

My truck is just 2 mos old and I hit 100 mph for the first time yesterday. Yup, it was scary. It was like being on a flying carpet !!

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Flying carpet feeling at 100+ usually has a lot to do with the up/downs in the road.

I've run my 2018 SCrew up to ~130 with solid handling. The tires aren't rated for speeds that high though and make lots of noise as the tread starts to wrinkle up. I don't recommend it... If your air pressure is too low the BFGs will also feel real squirrelly at higher speeds as well.