Cooper STT vs Toyo Open Country 315's

[jamisobe]

Thanks, I edited post 1 with the widths that seem to be pretty much the same based on what Tim measured. The means that height and weight are the only deltas.

So is the 13-16 lbs additional weight per tire a nit and a non factor.

"Given that each pound of rotational mass lost provides an equivalent performance gain as a 10 pound reduction in vehicle weight, the benefits of light alloy wheels on vehicle performance cannot be overlooked.
For example:
***A reduction in the weight of the rim/tire assembly of 5lbs x 4 (all around the car) is equivalent to a 200lb weight reduction in vehicle weight (thats worth 0.200 in the 1/4 mile)*** "

I read somewhere else where they said every pound of weight on the wheel lost was like 8 lost from the chasis.

 

[jamisobe]

The weight is a big deal for me, but I want a solid tire. I know that the Toyo is a great tire from my research, but I don't know enough about the Cooper. Luckily, I can wait for a while longer before I have jump.

 

[jamisobe]

But on the other hand...

that extra 1300-1400 of tire load capacity could come in handy if I need to tow a load.

 

[jamisobe]

Peterson's four wheel article:

http://home.earthlink.net/~jandastavola/cooper-stt.jpg

The web:
http://www.swindolllaw.com/news/CooperTire.htm

 

[g8mfzj80]

After seeing both these in action on the rocks, mixed dirt, desert tracks several times and talking with the owners I would take the toyos. The sidewalls are tougher and some of the baja guys I known run and rave about them.

For what I’ve seen the coopers are not nearly as sticky on rocks and you have air down more. On the higway the coopers seemed louder than say a typical AT like the BFG KO's while the toyos are about the same.

I personally think wider tires add some stability as you go higher so the toyos help in that area IMO.

Other one that looks good (same price as the coopers) but I have'nt heard too many reviews on is the MT Baja Radial MTZ

 

[Romer]

You guys convinced me, I'm going with the swampers





No really the Toyo Open Country. The fact they stick on the rock a bit better, stronger sidewall and are quiet (Comparatively) on the highway. Looks like I'll be putting those L shocks I have on.

 

[Nay]

If money is not the issue I don't see what the debate is about. The biggest issue with MT's this size is balancing, and the Toyos from all the reports appear to have that nailed. I bet you will like the Toyos for road use better than your BFG AT's.

You have a supercharger...so tire weight should be a non-issue. Look, I lug around 35" load range E trxus on 4.10's without forced induction, and when I went from 285 BFG AT's to 33" trxus when I first bought the rig, which is a much heavier tire, it didn't make any difference (sucked before and after). This question is splitting hairs on a rig with 35" tires.

As far as front end component wear, an unbalanced tire is going to be far more problematic than a heavier tire. That is the reason to buy the Toyos, and I would absolutely pay $25 a tire for this.

Plus, the smallish 315's are a negative in my view. The 80 can handle a true 35" tire. Go for it!

Nay

 

[kennyv0826]

I think the Toyo is your best bet even though they are both excellent tires from all accounts I've heard. I don't think the extra weight will make a big difference in the way you 80 drives. And that weight is there for a reason. It makes the tire stronger, and I think we'll all agree that is never a negative (especially off road).

Let us know how you like them. I'm gonna install some 37" Toyo's pretty soon. I'm excited!

 

[jamisobe]

I am agreeing on the weight issue. The extra weight may have something to do with the Toyo being a more streetable tire as well as load capacity. Maybe when I switch my 33s to 35s I will sell my 4.88s and go for the 5.29s. That should more than compensate for the added rolling mass. I don't want to be a slug.

 

[MoJ]

I am agreeing on the weight issue. The extra weight may have something to do with the Toyo being a more streetable tire as well as load capacity. Maybe when I switch my 33s to 35s I will sell my 4.88s and go for the 5.29s. That should more than compensate for the added rolling mass. I don't want to be a slug.

The general recommendation by many for re-gearing when going to 35's is 4.88.

 

[jamisobe]

The general recommendation by many for re-gearing when going to 35's is 4.88.

I have read that. I think it is a good way to maintain a somewhat accurate speedo. However, I have a tru-speed calibrator that makes it really easy to adjust for different gearing and size tires.

I am amazed at how quick my truck is with exhaust mods, 33s, and 4.88s

Conserving gas isn't as important to me as throttle response or acceleration on the road. Afterall, have you seen gas prices? They are all the way down to 2.20 a gallon. That's practically free!

 

[Romer]

I ended up with the 315/75/R15 Toyo Open Country MT's. Even though they were siped, I had the tire dealer sipe them some more as I thought it could use a bit more. The tire guys said they were really heavy tires and two guys lifted up the spare.

Everyone was right about the highway behavior. I was concerned because driving Rachel's 4ruuner with Goodyear MTRs, I thought they might be loud. I really didn't notice the difference between them and my BFG ATKOs (Now Sarah's Tires).

I did notice a difference in the power loss. Not sure how much is attributable to the weight or the 2" larger tire.

Tomorrow, I will be installing L shocks. Since you are close to what needs to be done to swap or modify the springs, I went to visit Christo (Should try it Shotts). We put it up on his ramp and he showed me were to trim it. We talked about adding more lift (spacers/Springs). I wanted to know if it was necessary. He basically said if my plans are to wheel in the same kind of stuff I am now, then no. I do need to add bump stops and he suggested I wheel it and if where they hit the bump stops bothers me, then add lift, but otherwise leave it alone.

He said if because I have bigger tires I start to get bored and want to try harder stuff, then I should add lift. Adding a lift adds other concerns with the drive line, etc. so leave it alone if I am happy with it.

They drove great, I am real happy with them. Can't wait to wheel with them.

Note : first pick with 285's, 2nd pic with the Toyo's

 

[jamisobe]

Those are some sweet lookin' feet. I've been looking around and the Toyos are seeming like the way I will eventually go even though the heavier, taller tires will sacrifice acceleration on the street. I must start thinking 5.29s, 5.29s, 5.29s.

Congratulations!

 

[NorCalSam]

That looks sweet!
What lift do you have and are you now hitting or rubbing in any way?
Are you thinking of installing L shocks to a 2.5" lift? And If so let me know what you think of that wondering if the 2" of lost up travel will be missed.
later.

Congratulations on the new rubber.

 

[Romer]

I have 850J's in the front and 863's in the back. With all the goodies I have, that gives me about a 3" lift. Chrsito showed me via the ramp that I will need to trim a little off the inside of the flare, you won't be able to tell. I will be putting L shocks on in the next few days.

 

[tarbe]

Now you need to go back and do that black trail with the Toyos!

We are twins, once again

ps - your body man is fast!

 

[Buckru]

The truck looks frikin sweet Romer. Did I miss the thread about the "Flat Nasty Passenger Side Repair"?

Buck

 

[Hayes]

Those look sweet.
Your rig looks very nice.

After all this talk of 315's and MT's, and now that my 80 is no longer a daily-driver, I've been daydreaming of 4" lifts and 35" tires for the first time ever...

...it'll never fly with the wife...

I ended up with the 315/75/R15 Toyo Open Country MT's. Even though they were siped, I had the tire dealer sipe them some more as I thought it could use a bit more. The tire guys said they were really heavy tires and two guys lifted up the spare.

Everyone was right about the highway behavior. I was concerned because driving Rachel's 4ruuner with Goodyear MTRs, I thought they might be loud. I really didn't notice the difference between them and my BFG ATKOs (Now Sarah's Tires).

I did notice a difference in the power loss. Not sure how much is attributable to the weight or the 2" larger tire.

Tomorrow, I will be installing L shocks. Since you are close to what needs to be done to swap or modify the springs, I went to visit Christo (Should try it Shotts). We put it up on his ramp and he showed me were to trim it. We talked about adding more lift (spacers/Springs). I wanted to know if it was necessary. He basically said if my plans are to wheel in the same kind of stuff I am now, then no. I do need to add bump stops and he suggested I wheel it and if where they hit the bump stops bothers me, then add lift, but otherwise leave it alone.

He said if because I have bigger tires I start to get bored and want to try harder stuff, then I should add lift. Adding a lift adds other concerns with the drive line, etc. so leave it alone if I am happy with it.

They drove great, I am real happy with them. Can't wait to wheel with them.

Note : first pick with 285's, 2nd pic with the Toyo's

 

[Romer]

The truck looks frikin sweet Romer. Did I miss the thread about the "Flat Nasty Passenger Side Repair"?

Buck

https://forum.ih8mud.com/showpost.php?p=1471548&postcount=61

 

[ginericLC]

Romer,

I'm running the Js with a 1" spacer in the front with the 315 Toyos. I have about 10k or so on them I'm guessing. They do get a little louder as they wear but my tire guy says at about 20k they will quiet back down. My friend with brand new Cooper STTs says my tires are quiet. I think they are acceptable for what they are.

I rub on the PS rear flare under full compression. I think if I took a 1/2" off the lip of the flare I'd be OK. I'm not running any additional bumpstops over factory. I didn't drop them at all. Front has never been an issue. I have not relocated my panhard bars. I think if I did I would have zero rubbing through the whole range.

They are heavy. I have noticed a decrease in mileage and stopping ability. I went from 315/75/16 BFG ATs that didn't even have 5k on them.

I like that they balance well. I have one with only .5 oz of weight.

Mine are chunking but that is expected for our lava rock. Other than a Swamper SXs everything pretty much chunks in our rock. I've had zero sidewall issues. I've run them as low as 10psi. Mostly I try to run about 12 psi or so on the trail. On long trips I've run them as high as 42psi. Sidewalls are a big deal here. MTRs have issues, BFGs are any easy pick in the sidewall too.

If it weren't for price I probably would not even consider another tire. For awhile they were almost $300 a pop. They've come down a little in price again. I paid $204 or 206 for mine. In Idaho, they are running right around $270 right now. At these prices I've considered going to two sets of wheels and tires. A cheap BFG AT for the highway and a Swamper Bias for the trail. Longevity wise I think I'd come out ahead with the two sets but it would be a PITA to swap all the time.

I'm happy with the dual role that they play very well. We will see how they handle this winter. If good, then I'll be conviced they are the best all around tire.