Had discount tire replace two tires and they put the new tires on the rear. Shouldn't they've put the new tires on the front? Now it seems like the rear of the truck sways, really bad when hooked up to my 5400# travel trailer. Everything seems tight and it was sudden

 

Simple questions you probably already have covered, but figured I would ask:

I assume they put on tires of the proper load range correct?

What pressure did they set them at?

My truck is pretty sensitive to psi in the rear tires when towing. I swapped to Load Range Ds several weeks back as my Terra Grapplers in C were like towing with marshmellows back there unless I had them pushing their 65psi max.

 

60 psi in the front and 70 psi in the rear. 265/75/16 load range e

 

I just bumped the fronts up to 70 psi

 

If the new tires are BFG All Terrains take em back.

 

Hell no, I went with cooper discover ATP

 

Ok good. I see you share my animosity
I have no experience with the Discovery's. The BFG's made my truck feel like it had caster wheels on the rear of the truck & it swayed enough to get me pulled over for possible DUI. until I aired them down to 55 psi and the tread was flat on the road.
I would try a lower PSI and see what happens. Some of the "off road & All terrain" tires have a softer sidewall for off road grip and make horrible towing tires.

 

New tires always go on the rear. If you put them on the front the back end would slide out on slippery turns. Putting them on the rear ensures they follow the fronts.

It is very common to feel like new tires are slippery. They often have a factory coat that needs to come off, and they are often buldged in the middle of the tread reducing the contact patch. Inflate to the proper PSI, the one you will normally use, and drive them. They just need to wear in.

I haven't had any problems with towing on AT and MT tires. We do it all the time here for our toys. My buddy pulls his 12000lb trailer and his truck sits on Generals right now and previously on BFG ATs. Both did fine. As long as the load range is appropriate. E preferred. D if safe. D rated tires will just have a softer sidewall. My MTs are an E rated tire. I believe the Generals are as well. The BFGs my friend used were actually D's and he never even realized it. When I had BFGs mine were E rated. All depends on your needs. But I wouldn't blame your tire in this case. Let them wear in for a while.

 

Door sticker says fronts 55 psi and rears 70 psi, is that loaded or unloaded psi?

 

I would guess unloaded, but I'm not honestly sure.
Each brand & type of tire will differ.
I've had four different types of tire on the rear of my truck, All rated "E", all 80 psi max. Two (BFG Commercial & Mich LTX) ran great with 80 psi empty and loaded, The BFG AT's 55 empty, 65 loaded. My current Michelin Traction's feel better at 60 psi loaded & empty.
Long story short you'll have to experiment with different pressures and see what works for your truck & load.

 

Unloaded and cold.

Personally I generally put my tires at their rated maximum. Generally it extends life.

 

So bump all tires up to 80 psi?

 

I did the same for a while, and I saw better tire wear - but the ride is a little rougher. I'm about to go back to full 80 in the front and keep the rears at 65 until I need to load 'im up. My front tires are getting uneven wear on the edges with 65 PSI - bad call on my part. Now I'm stuck with tire noise until it's time to re-shoe the beast.

 

I'll raise front to 80 and lower rear to 65 and see what happens thanks for the help fellas

 

Does the sway go away when you are not towing the travel trailer?
- Torklift Jen