Isuzu SUV Forum banner
1 - 20 of 22 Posts

·
Registered
Joined
·
390 Posts
Discussion Starter · #1 ·
Ok, so I have a 2000 rodeo. Its lifted on ome 912 springs, and a torsion twist up front. When it was done the shocks were replaced with rancho rs5000 all around. Tires are 265/75 r 16 e rated. I know the e rated tires dont help with the ride! However,, it just seems overly harsh. Sometimes when going over a dip in the pavement, the rear tires will actually chirp as if the suspension did not move. Its terrible!

Is it the springs? Shocks too stiff? Is it everything contributing to the hard ride?

Would a switch to 913 springs help? Any other kind of shocks recommended?
 

·
Registered
Joined
·
4,649 Posts
E rated tires will provide a really harsh ride. Also, if you cranks the t-bars more than about 2" you have removed a whole lot of spring in the front end. I once delivered a second gen Amigo with stiff tires and the t-bars cranked to the max from MD to NC and thought that my teeth would shake loose. I could feel every crack in the road. I hated it.
 

·
Registered
Joined
·
1,842 Posts
E-rated tires are too stiff.

What tire pressure you are running ? You have to set the tire pressure that on your vehicle specs (which is 26psi). The pressure on the tire (80psi) is just a max pressure that the tire may take. Deflate them to 26 psi.

Also, Rancho 5000 are stiff shocks.
 

·
Registered
Joined
·
11,467 Posts
Thats why I went with the rancho 9000s, they can be adjusted. #3 in front and #4 in rear for on road gives a great ride. Offroad I crank them up to 9. I also run C rated tires, no need to run anything heavier on these trucks.
 

·
Registered
Joined
·
1,567 Posts
ofg said:
I know the e rated tires dont help with the ride!
I believe you just answered your own question.

912 springs ride fine, and I don't know about the shocks, but I do know that E rated tires are way to stiff for light truck like a Rodeo. I'd leave the E rated tires for the guys with 1-ton pickups who tow a lot.

Remember that before the shock of that pothole even gets to the shocks or springs it has to go through the tire. The less impact the tire absorbs, the more your shocks/springs have to, and it may just be to much for them to handle.
 

·
Registered
Joined
·
390 Posts
Discussion Starter · #7 ·
I have been wanting to change over to some 245/75 C rated tires for quite a while now. Just havent been willing to give up the $$ to replace my geolanders that have perhaps 10k miles on them,, and are still nearly new looking.

I may look into replacing the shocks too. Oh well,, Dealing with it for now.
 

·
Registered
Joined
·
5,475 Posts
This is why more then several times I've recommended NEVER using E-rated tires on these trucks....they are HORRIBLE in ride quality.

And personally, after trying 3 different types of shocks, there's no need to spend a fortune on shocks for these trucks either.

I've ran E-ply's and D-ply's on my rodeo....hated both!

Problem is, if you're running an e-ply tire, you can NOT put the pressure as low as 26psi as previously recommended...sorry, but you can't. The tire itself is built to have minimum pressure as well or you WILL ruin the internal casing and possible risk of a blowout.

Per a few tire places I've visited over the years, they all seemed to agree that an E-rated tire should have nothing less then 45psi, 50 is preferred. Yes I know your truck doesn't NEED 50psi, but that TIRE does in order to run cool and healthy....have to keep in mind, these tires were built for a 1 ton truck, not a lightweight 1/2 ton.

After several years of rattling my teeth out, in my mistaken upgrades of taking a once fun truck to drive to a truck with E-rated tires, and upgraded shocks (thinking it needed them)....I finally gave in and ate my upgrades, if you know what I mean.

I returned the truck to your standard everyday shock, ie. Monroe sensatracks, which most here don't like, but they work great for me and didn't cost squat compared to Rancho's, etc

Took off the heavy tires and returned to C-rated, very aggressive tread design, and the truck drives like it's brand new again....I too have a 2" lift, also installed new ball joints....however from the time it had 75k miles to the time it rolled 190k I HATED the way it road.

It now has 201k miles, put the new tires and shocks on over a year ago....and I'm in love with this truck all over again!

It seriously does pay to NOT overdue what these trucks were designed for....they came from the factory with P rated tires after all....for most of them anyways.

If you had LT 265 tires in the E - load range I'd buy them from you in a heartbeat, I have a diesel cummins due for tires REAL soon....the 245's are too small for it though.

You could always try to sell your tires too; there are a ton of 3/4 - 1 ton truck owners who run that size, trust me, it's a very common sized tire for the bigger trucks.

I will tell you, I tried for years to stick it out...i.e. just deal with the harsh ride, but it got to where I literally hated the truck and I was mad at myself for wasting money.

Discount tire worked with me however and realized that I did make the mistake, but they did buy back the tires at a rate that allowed me to look at newer ones....in my file however, it is noted that they are not allowed to sell me an E or even D rated tire for the rodeo.

I do still have D-rated tires on my Toyota Tacoma, which weighs about the same as the Rodeo....but they are just about shot, and will be replaced with C-ply's as well. The Tacoma doesn't have a super harsh ride though like the rodeo did.
 

·
Registered
Joined
·
2,823 Posts
Minimum highway pressure for an e-rated tire is 50psi, running them at a lower pressure tends to destroy the sidewall.
 

·
Registered
Joined
·
556 Posts
I've heard all of the complaints about the poor ride quality of E rated tires but I ran them on my Trooper for 4 years. They were fine by my standards. I run my tires around 10 PSI less than max and have had even wear and a decent ride. Had C rated Goodyears on before the E BF All Terrains and the difference was not really noticable. Everyone is saying the Ranchos are rough so try changing them out. I figure I drive a 4wheel drive not a Caddy.
 

·
Registered
Joined
·
1,204 Posts
I would not run E's lower than 45 psi ever. Its too much tire and too heavy, C's are the way to go.
 

·
Registered
Joined
·
390 Posts
Discussion Starter · #12 ·
Been running my E rated tires at 50psi. I know running them lower will induce un even wear, and damage the structure internally.

Its gotten so bad that I too am starting to hate what used to be my favorite ride! Was riding around in a friends jeep with solid axles, and big soft tires,, it rode great!

I will go ahead and put the tires on craigslist and see what happens. They are 265/75-16 geolander ATS.

A while back the plan was to put these on my truck, but truck does not need new tires either.
 

·
Registered
Joined
·
134 Posts
i have e ply and the fierstone dealer put them at32psi they been on my pasport for 2 years now. and i have know bad things to say about them.
 

·
Registered
Joined
·
5,475 Posts
grobrooks said:
. I figure I drive a 4wheel drive not a Caddy.
I've only ever owned 4 wheel drives my entire life, everything from the old 3/4 ton chevy long bed trucks, to bouncing toyota p/up's of the early 80's with solid front axles, old jeeps from my grandfathers generation....not ONE of them rode as harsh as the rodeo did when I had E-load range tires on it.

Has nothing to do with wanting it to ride like a caddy, has everything to do with the fact NO one could stand to ride in it, not family, not friends, etc....what's the point of keeping a vehicle in that condition if no one likes it?

End result is the truck had to work for everyone, it's our excursion, cross country vehicle....not just an offroad hobby.

The C-rated tires I have now are about 10-12lbs lighter PER tire then the E-rated tires I had in the past....both were of the Goodyear brand, but different tread design. Also get much better gas mileage with the C-rated tires, which always helps.
 

·
Registered
Joined
·
5,475 Posts
grobrooks said:
Like I said, I couldn't tell a huge difference. My wife drove a 4runner until a few months ago and it rode as well as her P rated Michelins. Maybe I'm just not picky, who knows.
The harshness in mine had nothing to do with being picky....the ride on mine was so rough that everything rattled, doors, windows, rear view mirror, even the steering wheel had a harsh feel to it....every pot hole felt like you jarred into a straight edged curb.

However...keep in mind, I have leaf springs, not the softer suspension the troopers came with.
 

·
Registered
Joined
·
1,842 Posts
Ramblin Fever said:
Problem is, if you're running an e-ply tire, you can NOT put the pressure as low as 26psi as previously recommended...sorry, but you can't. The tire itself is built to have minimum pressure as well or you WILL ruin the internal casing and possible risk of a blowout.

Per a few tire places I've visited over the years, they all seemed to agree that an E-rated tire should have nothing less then 45psi, 50 is preferred.
I'd like to ask you for the technical references - where did you get this information. "Few tire places" does not sound like a dependable source of information. The truth is, the "tire places" know nothing about tires, really. They just spread the urban legends. I have not seen any "tire place" person in my life who knows tires. May be, I just have been unlucky.

But regardless the validity of this information, my advise was running them 26psi to salvage some usable life from the tire, even if they will be deteriorating quickly. 20000 miles of more-or-less normal ride is better than 60000 miles of awful jarring ride, right ?

They best choice would be to sell the tires, and get some C-rated ones.

When I had D-rated tires, the ride was so-so, even with 26 psi. When I tried 30 or 35 psi, the ride was really harsh. I can imagine what would E-rated tires, inflated to 50 psi, do.
 

·
Registered
Joined
·
5,475 Posts
holger said:
I'd like to ask you for the technical references - where did you get this information. "Few tire places" does not sound like a dependable source of information. The truth is, the "tire places" know nothing about tires, really. They just spread the urban legends. I have not seen any "tire place" person in my life who knows tires. May be, I just have been unlucky.

.
Truth is most of us don't know about tire technical specs either.

Take some time and research a guy by the name of Capri-racer over at bobs the oil guy website in the tire section, he is a tire specialist; can also point you to Goodyear tire division themselves, as they did research into why I ruined the casings of a set of E-load range tires I consistently ran at 35psi and nearly caused 2 to blow out.
 

·
Registered
Joined
·
1,842 Posts
Ramblin Fever said:
can also point you to Goodyear tire division themselves, as they did research into why I ruined the casings of a set of E-load range tires I consistently ran at 35psi and nearly caused 2 to blow out.
OK... thanks for the reference. I hope they did not try to cover up and they did not make it up.
 

·
Registered
Joined
·
5,475 Posts
holger said:
Ramblin Fever said:
can also point you to Goodyear tire division themselves, as they did research into why I ruined the casings of a set of E-load range tires I consistently ran at 35psi and nearly caused 2 to blow out.
OK... thanks for the reference. I hope they did not try to cover up and they did not make it up.
If we, as the general public, doubted everything any manufactorer should comment upon, we'd be in serious constant worry about every thing.....life is too short.

For me, I was more then happy to move on to a different tire, however they cared to swallow the problem didn't bother me. I personally always knew that a Load range E tire didn't belong on that light of a truck, so it was mostly my error more then theirs.
 
1 - 20 of 22 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top