35s wander all over the road

[pimtool]

I have just started running 35/12.50 BFG muds on 15x10 wheels. They only have about 20psi in them and they seem to wander all over the place.
I havent tried to up the pressure any cause airing up and down is a pita. The truck doesnt see very many road miles. And yes I do have some bump steer but this is different then when I had the 32s

Is this pretty much normal?

Thanks.

 

[mhughes165]

bigger tires wander, just a way of life, run a dual steering stabilizer and make sure ur steering geometry is correct, all that u can do really

 

[4x4junkie]

Pump them up.

My 35s feel wobbly when they're not aired up also (if you have bumpsteer, that ain't doing anything to help with the 35s either).

 

[91exploreron37]

I run my 35in BFG's at 40psi because its a daily driver. If you think about it theres alot more sidewall on a 35 compared to a 32 so when ran at lower pressures it "rolls" over more.

 

[4x4junkie]

FYI, the max cold pressure listed on the sidewall of a 35x12.50R15 BFG is 35 PSI. I wouldn't go over that.

 

[91exploreron37]

Yea I know but it drives alot better at that psi even though the ride is a little rougher. I have to drive back and forth from work and school on narrow lanes in traffic and cant afford to drift into somebodys car. And plus it creates a little less rolling resistance thus increasing gas mileage by a little percent.

 

[98ranger4x4]

I run my 35in BFG's at 40psi because its a daily driver. If you think about it theres alot more sidewall on a 35 compared to a 32 so when ran at lower pressures it "rolls" over more.

+1 with 4x4junkie. and you also have to consider that is pounds per square inch and there is a lot more "square inches" in a 35x12.50 15 than in a 32x11.50 15 so you dont need to run as much air pressure to support the same amount of weight, hence the load range C having a max of 35 on a 35 inch tire vs a load range C 32 inch tire having a max of 50. IMO i would air them up to about 30, but like 4x4junkie said, dont go over the max pressure.

 

[Bent Bolt]

And plus it creates a little less rolling resistance thus increasing gas mileage by a little percent.

Not to mention the extra wear and tear on the center of the tread.

 

[4x4junkie]

If it's wandering so bad you're afraid of hitting someone, you've got some other issues under there besides tire pressure (high probability it's in your steering if it's lifted). I'd fix it instead of trying to compensate for it with rock-hard tires.

 

[91exploreron37]

There isnt any thing wrong with my steering, everything's in excellent condition. I've replaced the pitman arm, tie rods and ends, ball joints, axle pivot bushings and radius arm bushings when I installed the lift and I aligned it at work. There is a little slack in the steering shaft but thats nothing to worry about right now even though its on the list to do. I also mainly run my tires higher then normal because of the way I drive and dont like the feel of my tires rolling over on sharp turns.

 

[91exploreron37]

Oh yea and I am well aware that its a lifted truck and shouldnt be drove like a sports car due to the higher center of gravity and its tendency to roll over. So please dont tell me to stop driving it like one and lower my air pressure.

 

[Original_Ranger84]

Oh yea and I am well aware that its a lifted truck and shouldnt be drove like a sports car due to the higher center of gravity and its tendency to roll over. So please dont tell me to stop driving it like one and lower my air pressure.

Stop driving your monster truck like a sports car, you might accidently run one over, I don't see you scraping mini cooper or miata panels from the bottom of your truck.

 

[mhughes165]

There isnt any thing wrong with my steering, everything's in excellent condition. I've replaced the pitman arm, tie rods and ends, ball joints, axle pivot bushings and radius arm bushings when I installed the lift and I aligned it at work. There is a little slack in the steering shaft but thats nothing to worry about right now even though its on the list to do. I also mainly run my tires higher then normal because of the way I drive and dont like the feel of my tires rolling over on sharp turns.

post up a pic of your front steering geometry, is probably not that close to being leve, on the ranger TTB suspension the steering geometry needs ot be close to level as possible. u would be fine to air ur tires down to 35 psi even, u wont even notice the difference and u want be pissed cause ur tires will have a bald spot in the center....actually airing the tire down slightly will allow u to handle better, becuase at higher pressures it pushes the center of the tread out more and creates less of a footprint to transfer stresses to. by having equal contact at reccomended pressures u have better footprint, better handling and less wandering

 

[Yank]

The 35's tread are just a huge hunk of rubber beating the road. They aren't radial tuned as the AT's are or a regular radial tire for a car or truck. Run the manufacturers suggested psi and rock and roll. I built these puppies for 25 years and I still balk at putting them on my Ranger. They are tough on a suspention and make you feel bullet-proof when you see that terrain ahead that you know you shouldn't go through! lol I loved my Buckshots but they got me into trouble one to many times, terrain-wise. It wasn't me getting in trouble...The tires made me do it! Roll on, brother!

 

[mhughes165]

It wasn't me getting in trouble...The tires made me do it!

i think i got myself a new signature