New Cooper Discovery Rugged Trek tires!!

moving from stock tires to 275/70-18 AT tires, E load rating you will drop about 1-1.5MPG. Due to the heavier tires, larger size and more aggressive AT tread.

 

Ford puts the same pathetic P-rated, lightweight tires on their F150. I swapped my F150 275/65 to 275/70 tires (went with BFG A/T KOs) and saw a 1mpg drop. That’s after I reset the speedometer and did a GPS comparison to ensure my miles recorded was accurate.

Lots of people report a bigger drop and I’m curious if they’ve reset their speedometer. A larger tire is going to record fewer miles and that negatively impacts the MPG calculation.

We all drive differently in different environments with different loads. One person may see a 1mpg drop, while another sees 1.5. I suggest planning for a drop of 2mpg and be happy when it isn’t that bad.

 

Never messed with something like this before, so how would one reset the speedometer? That’s something a specialty shop has to do to recalibrate? I’m contemplating going up a size as well is why I ask.

 

It was easy on my Ford. I’m actually unsure how to do it on the Tundra. Haven’t researched that yet.

When I make the switch on my Tundra, I plan to verify the speed/mile difference first before I do anything. My truck is already 1+mph fast with the stock tires.

 

Ok gotcha. Keep us posted!

 

@TRDSteepSLOPE , @ScenicRoute , @Jsnake89 , @BayRunner . Can you give us an update on how these Cooper Discovery Rugged Trek tires are working out for you? How many miles do you have logged? How is the traction? On/off road? etc.?

 

well my Initial opinion is not good. Tried several times. Ran wheels only to make sure that wasn’t issue.

ounces to balance:
17
9.5
4.5
20.5

4.5 is acceptable. 9.5 in a bit much. The other two are completely unacceptable.

 

Mine has been perfect from the beginning. Balanced perfectly and run very smooth. Has held traction in all conditions I’ve run in so far.

I run the Rugged Treks on a Taco and Toyo ATIII on the Tundra. The Rugged Treks run as good as the Toyo’s and about the same noise level. Primarily drive the Taco right now while I protect the Tundra from cat theft as I wait for my deterant plates.

The Rugged Treks are a lighter version of the Mickey Thompson Boss ATs which I think will be replacing the ST MAX.

 

That is disappointing. What size are you running?

 

35x12.50x20. I’m going to call and see what’s up. That’s a very wide range to balance. However I do like the tires. Fairly quiet. They look aggressive.

 

275 70 18 Not very loud a little hum at 70-80 mph. At low speeds not much at all.
The noise is minimal for how aggressive these tires are

 

I see you have eibach rear shocks. Are you running the stage 1 set up front or the 2.0 coilovers? Is there any lift in the rear? Looking to run the eibach market with the same tires on my trd sport.

 

It was the stage 1 kit. There is no lift in the rear. The shocks may have lifted it about 1/2 inch but wasn't intentional.
This is what I bought.
I had to assemble the coilovers, to do this I had to buy strut tops.


I installed it myself it took about 3 hours from start to finish. I only had to take the sway bar and the upper control arm loose for the main suspension components. I also took the bolts out of the brake components to allow more play in the upper control arm
The hardest thing was getting the upper control arm back on. I used a ratchet strap to pull it into place

 

Ok thanks a lot, I have been looking at that kit and the 2.0 coilover kit they offer. Both say an average of 2.5” lift which had me curious because by my measurements there’s only 2” of rake so I didn’t know if it would end up squatting a little without putting a lift in the rear or if because it’s a crew max 4x4 if it would maybe not be the full 2.5”. I don’t really want to mess with the rear just lessen some of the rake and go up a tires size with a more aggressive tread. That’s the main reason i was looking at the 2.0 because I could always adjust them down while they were on the truck if it wasn’t what I wanted.

 

Tread is a little to open for a snow tire. If you look at the highest rated snow tires they all have tighter tread.

 

Yep, that’s the size I want. Looks perfect in the wheel well. That should have been the OEM size (and tire!). I’m even liking the “knife” side of the tire. Looks very clean.

 

At one time I was looking at 275/65/20 but now I am thinking about 275/60/20. Looking at this thread I was thinking about the Coopers. When I looked at the specs I saw that max PSI is 44. That is not going to work for me. I have KO2s from the factory and TPMS is set up for 46 lbs. Not sure about running a 115 load rated tire either. My boat is 5000 lbs.

 

Yeah, I had the same concern about the 275/60R20 Rugged Trek. For some reason it is SL rated. May force me to look at another option. (I have KO2's currently as well, 285/55R20, but planning to increase diameter to 275/60R20.)

 

If you don’t want to get these tires for whatever reason that is your prerogative, but the TPMS can easily be recalibrated, the procedure is in the manual.

 

A couple things to consider about your post...

• Your truck didn't come from the factory with KO2s, it was added at some point along the process, after the factory.
• Standard 18" wheel/tire pressure settings on the Tundra from the factory are 33psi F/R. These are easily changable through Techstream.
• Tire pressure doesn't directly equate to a load rating or load carrying capability.
• A tire with a 115 load rating is capable of carrying 2,679 each, or 5,358 across an axle. I would double check to make sure that your wheels can handle that much weight before you worry about the tires.
• Additionally, a 5,000lb boat being towed, and add another 2,000 for the trailer (so total tow load is 7,000lbs), should only be transferring something in the neighborhood of 10-12% to the tongue; using 15% is 1,050lb of tongue weight, or roughly 70% of the payload of the truck, but brings the weight on the rear axle to way less than 5,358. The rear axle of the Tundra is only rated to around 4,100lbs from another thread I found on here.

Bottom line, even in the SL fashion, the tires should be fine for the Tundra (specifically referencing carrying abilities)

 

Strictly speaking, you are correct. My truck, at least, came with KO2s as part of the regional TSS Offroad package. Not quite factory, but they are Toyota installed option.

 

Similarly, the tire pressure is also different as provided by Toyota. Note that a sticker for the TSS Off-road has been placed over the factory sticker

 

Not trying to be argumentative... Just information. Thank you for the SL load information.

 

As far as I am concerned the KO2s did come from the factory. They were part of the TSS Off Road package. The weight I gave is boat and trailer. I am not going to the exceed the MAX PSI on the tire or change the TPMS setting. I will just get a tire that has a higher max PSI. I DO understand load ratings on tires.

 

Just so that you understand, resetting the TPMS pressure is very easy. Anybody that has a brain could do it and it requires no tech stream or dealer to reset. Under the dashboard in the driver side is your TPMS reset button. You can reset to any PSI you desire. And you can run the tire psi at 40 if you want a softer ride or air up to 50 if you are hauling a trailer or just because you want a harder ride. That's all up to personal preference. You may get different tire wear depending on what you choose.

http://news.mikecalverttoyota.com/2016-toyota-tundra-tire-pressure-monitoring-system-tpms-houston/

 

Had 275/70r18s put on yesterday! Very quiet for how aggressive they are. Tread measures just over 18/32 deep! And they come with a 55,000 mile warranty.

I went the the “knife edge” sidewall and I’m glad I did!

Seem very smooth over bumps and railroad tracks on the way home. I’m happy!

 

Man these look awesome - look at that tread depth! Really wish they made them in more sizes though, will definitely be keeping an eye on them to see if that changes.

I've run Coopers on everything from my old Land Cruiser to my wife's Touareg and never had any issues. My go-to manufacturer for sure.

 

Those look great.

 

Is your truck at stock height? Any rubbing?

 

bone stock. no rubbing as far as I can tell.