I'm doing a dually conversion and i drove my truck for the first time yesterday with new tires and the dualls and holy cow the rear end seems to be snaking along behind me.

it's very squirrely, my cousin said everytime he puts new tires on the fleet of F450's the drivers say what did you do to my truck im gunna have a reck!

is this common or do i have an underlying problem?

Dar

 

I would expect just the opposite. I considered a dually and found their manners much nicer than the SRW variants I drove. I wonder what's up? air pressure OK?
cheers,
Douglas

 

https://www.dieseltruckresource.com/...s-t248980.html

 

I'm with twitchy, you said a "1-ton conversion" if you are using std., rear end , you have to center lug the wheels.Our older 1st. gen have a small lug on the hubs , be sure your wheels fit on those lugs,then center the wheels.

 

New tires will roll around. I put new tires on both our 1 ton dumps and they feel like innertubes for a while. Its just the tall tread flexing around. As they wear, it will get better.

 

If you mean squirrelly and not bumpy then yes I had that when I put on a new set of tires on the truck, the worst tires I have had were Firestone's, they feel like I could not keep it going straight and was down right scary, I took it back and put on Michelin's and the truck was as stable as ever, I have been running Michelin's ever since.

The owner of the tire shop said it was the mold release they spray inside the mold when the tires are made and it should ware off after a few hundred miles, made perfect since.

I have had this feeling on SRW trucks but nowhere as bad as with my dually I figure probably because there is so much area on the ground.

You can also get a bad ride with mismatched radial tires although some claim it is a wives tail.

Jim

 

Jim and Richie, thanks thats exactly whats going on, i put on a set of Yokohama Geolander A/T's, 235/85/16 the tread is like an inch deep and pretty soft, there supposed to be 50,000 mile tires.

I hope they don't take long to seat in, it's like i'm haulin around a half a tank of water.

When i made my spacers i went on and put 9/16ths studs in the rear end just for added insurance, every piece has had the run-out checked and set.

Darwin

 

I hear this a lot, regardless of whether the truck is SRW or DRW.

What is really going on is that you just are not used to the feel of all that new tread depth.

Most likely, the old tires had less depth of tread, therefore much less sideways flex.

The new tires have deeper UN-SUPPORTED tread and the weight of the truck swinging around above them is a feeling that you aren't used to.


That is why there is a maximum deepness of tread that is allowable; otherwise, companies would be making the tread twice as deep as it is; if they did, anything above 30-MPH would be scary.


Many good BIAS truck tires will be labeled "REGROOVABLE", and there are cutters made just for that purpose.

One would think that, if there is enough rubber there to be cutting new tread into, why didn't the manufacturer just go ahead and make the tread deeper in the first place.

If they did, the tread would have to be half gone before that sea-sick motion went away.


In a few days, you will get used to that new tire feeling and all will be good.

 

Mine did the same thing with new tires.

 

All 3 of my trucks, both single an dually did the same thing.

500 miles went by and the feeling was gone.

T.

 

The only time mine will do this is when I am doing this... Other than that I only have this problem when the road is beet down by heavy trucks and it leaves grooves in the blacktop.

http://youtu.be/Wh50O9KQtHc

 

Dad put a set of mudder tires on the back of the 01 2 wheel drive he had. The v6 could hardly turn them. The loose rear end never went away, he ended up changing them. I think after someone accidentily ran one low and about ruined it.

 

I changed out my Bridgestones (that had 65,000 miles on them) for some BF Goodrich Commercial tires (The Bridgestones were no longer made) And it felt real "squishy" until I got used to them. My guess is the Bridgestones were so old, and hard, and such little tread that is why the new tires felt so different (It was night and day!) Now, I dont even notice. Sounds to me like you have a completely different problem!

 

Thunderdog.....nope Squishy is the word, just like you said.

Dar

 

I don't know about any of your dually issues, but I think you will like those tires! I have the same ones, except they're 35's, but they have been wearing good, have excellent traction, and they ride and look great! I did notice they handled a lot different than my old 265's, but i think it had to do with tire size and tread depth. The yokohamas are pretty deep!