That's great news. I'll be picking one up eventually to do the same.

It seems like my MPGs have started to even out since getting these. Averaged 17.5mpg on a 2 hour trip to the lake at 75-78mph yesterday.

Another great thing about the skinnies, max stuffage and no rubbing.

17.5 mpg average at that speed with the larger meats is not bad at all. Glad the new tires are working out! I really like mine too but still have another week for my first long trip and so will see how they do.

Finally got a chance to get off the pavement and test out the Coopers. Didn't get too far out there, but did get on some decently challenging terrain to test them on. First impressions they did fantastic. Most of the terrain was loose rock and some dirt that they plowed right over. The few places I got stuck momentarily then used the terrain select and diff lock and powered right on through. Did a few water crossing that felt solid as can be, one area the depth was just up to the rocker panels. This was all at 40psi, I imagine the grip will be even that much better aired down on the Coopers.

Enjoy some pics

































And Tucker enjoying a nice dip in the river

I canweigh in on a user test report.

I installed a set prior to the FJ Summit in Ouray.

The 2 trails that tested the tires are Black Bear Pass and Poughkeepsie Gulch. Both trails are similar but very different.

Black Bear Pass is a high, steep narrow trail on loose shale rock. Not so much as far as rock obstacles but a lot of loose stuff.

Poughkeepsie Gulch is rock from the start to the finish. Loose rock, rock obstacles, wet rock, dry rock moving rock and more rock. The mail trail is paver size rocks with water runner the rocks.

Tire pressure on Black Bear Pass was 22 pounds. No side wall flex was noticed.
The tires held extremely well. This trail seemed to me to be a very easy trail. The Coopers had to have something to do with that. I had no concerns on the tires holding the trail on all that loose shale.

Tire pressure on Poughkeepsie was 18 pounds. No side wall flex was noticed. I think I could have gone down to maybe 12 pounds with no problem.

The Coopers performed excellent again. Slipping rocks on the trail was hardly noticed. Obstacles on the trail were traversed with ease and some were challenging to all vehicles.

Climbing the wall. I did not approach the wall at the optimal line and I dropped my passenger rear tire into a hole. This caused some loss of traction and some spinning both front and rear occurred. After placing some well positioned rocks under the front tires the wall was traversed with ease.

Post trail run check. There is a small amount of cutting on the top tread but very small amount and given the tire slashing environment that Poughkeepsie Gulch is I consider this nothing. No sign of damage to the side walls.

No mud trails and not enough snow to comment on.

Wet pavement traction was excellent. At 70- 80 the tires seemed to float a little but I do not think these tires are made for that speed. Coming back over Monarch Pass the tires cornered well and held the road well but I did feel a little untrusting going top speed around tight curves.


The only negative I have for these tires is getting them balanced. It took 3 times of balancing to get them correct. They are fine now but I did have to request a Road Force balance.

I purchased the tires from Discount Tires. Discount is great to work with at all levels.

Bottom line.

For off-roading I have run Goodyear Duratrack, Silent Armors, Pro Comp AT tires and Hankook Dynapro. Out of the group the Goodyear Silent Armors and Copper ST Maxx are equal in my perspective.

Before buying the Coopers I had the Hankook Dynapros with 80% tread life left. I did not need to change tires but I wanted to try out the Coopers on the trails in Ouray and I wanted the tire warranty that Discount Tires provides.

I am happy with changing out the Dynapros to Coopers.

@alexb and @Desert Fox ; great updates, thanks! I can't wait to try mine out!

It would be good to see your 4Runner in Ouray at the next FJ Summit, you are not that far away.

Yeah, my brother has a FJ and wants to go with me too. Just might do it! Thanks!

I have the same size but in BF MT KM2... (spare tire included) and NO PROBLEM... They fit perfectly!... But now, I'm using my truck 99.99% street, now I want those...

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Did you keep your toytec coilovers set at the factory shipped setting or did you adjust? I'm about to install the Boss kit myself and I really like your truck's stance. I also purchased the S/T Maxx 255/80-17's.

Factory shipped settings. Thanks! You'll love it!

I didn't go through your whole build... But can I ask?
Did you do any trimming, mud flap removal, or BMC in the front for rubbing?

I have not. With the stock wheels there was no rubbing, but with my Konig's the driver side rubs the mudflap slightly when turning at low speed. I haven't tried to remove them yet since it's pretty minor.

Less weight per tire, less wind resistance, less rolling resistance, less wear and tear on suspension and steering components, they're better across the board.

Tires look great....I ran some 33x10.50's on a lifted 2dr Jeep XJ, being swampers they were killer in the snow and awesome in mud. Never even aired them down, in 26in of snow I seriously had no real issues. I like the tall and skinniness of the 255/80/17 and may run those when its time to replace the 285/70/17's my truck came with.

I love the look of your rig.

How is your mpg since you have FN wheels? It is because i believe FN wheels are more light than the stock wheels. Your rig did 17.5 mpg with stock wheels and stmaxx tires, right?