. I’m super stoked to have them.
Have you checked your calibration with a GPS? As far as I know dealers in Canada haven’t had the ability to adjust for tire size for a while now.I’ve got just over a month with my KO3’s 315/70/17 (calibration done at the dealership) and set the PSI via chaulk test. Fronts are 32 PSI and the backs are 30 PSI for full tread contact. I figure the difference is because of the engine up front and the extra weight of that. If you run the PSI to what the door says or what the installer puts them at, (35 PSI) the outer tread does not touch the road.
I’ve had KO2’s for the last 6 years, on the Tacoma sport for 3 and my JTR for 3 and ran this last set to 105k kms and tread was darn near the wear bar on those. It was time to upgrade in larger size but I wanted the KO3’s.
I’m glad I did. I was surprised to know they are 12 ply but these tires are very quiet and roll over road obstacles and cracks very smoothly compared to the K02’s. I’ve had to balance a couple times now because of very slight steering wheel vibration at around 100 km/hour (60 mph) but I’m taking them in now to get them road force balanced on Monday.
Another shocker for me is my MPG went up (for you Americans) and my litres/100 went down for us Canadians. I thought because of the near 35” I was going to, my gas mileage would have suffered but NOPE, it improved. I have done two trips already west of Calgary and have done many trips up to Edmonton from Calgary on the KO2’s and if anyone here has travelled those highways, there is plenty of headwind to plow through with our bricks. I have always gotten 17L/100 (13.8 mpg) in a strong headwind so I was expecting worse when I took two trips west of Calgary with the same westerly headwinds with the 35” KO3’s. My gas mileage read 13.5L/100 (17.4 mpg) !!
I can’t come up with proof as to why other than the science behind the new tread pattern changed the rolling resistance of the new tires.
Haven’t checked with a GPS. I will next time I’m out. I should have took a screen shot of my mileage. I’ll take a screenshot of my gas mileage and update ya all next time I’m bucking the headwind on the highway again.
About a week following the calibration, I get the service contract from FCA congratulating me for coming in to have this done. We know at least one dealership up here can do it. They calibrated my last set of tires too which were the KO2’s 285/75/17.
So, just cuz I could, I looked up my weather app and saw there was a good headwind from the north west so I jumped in the truck and drove 19 kms to Cochrane and took a photo of my gas mileage. I then drove all the way back and took another photo of the mileage with a tail wind. You can say I didn’t drive far enough but I did when I loaded up the wife and the Dane (twice) and headed off to the mountains and saw the same 13.5L/100 going out there and it was 10 something coming back.
I too noticed an increase in MPG on my ecodiesel … shocked the F load rating feels so smooth. These are a good tire so far. Hope they pick up stones a bit less than the KO and KO2’s … I almost went KM3 because of the stone tossing.I’ve got just over a month with my KO3’s 315/70/17 (calibration done at the dealership) and set the PSI via chaulk test. Fronts are 32 PSI and the backs are 30 PSI for full tread contact. I figure the difference is because of the engine up front and the extra weight of that. If you run the PSI to what the door says or what the installer puts them at, (35 PSI) the outer tread does not touch the road.
I’ve had KO2’s for the last 6 years, on the Tacoma sport for 3 and my JTR for 3 and ran this last set to 105k kms and tread was darn near the wear bar on those. It was time to upgrade in larger size but I wanted the KO3’s.
I’m glad I did. I was surprised to know they are 12 ply but these tires are very quiet and roll over road obstacles and cracks very smoothly compared to the K02’s. I’ve had to balance a couple times now because of very slight steering wheel vibration at around 100 km/hour (60 mph) but I’m taking them in now to get them road force balanced on Monday.
Another shocker for me is my MPG went up (for you Americans) and my litres/100 went down for us Canadians. I thought because of the near 35” I was going to, my gas mileage would have suffered but NOPE, it improved. I have done two trips already west of Calgary and have done many trips up to Edmonton from Calgary on the KO2’s and if anyone here has travelled those highways, there is plenty of headwind to plow through with our bricks. I have always gotten 17L/100 (13.8 mpg) in a strong headwind so I was expecting worse when I took two trips west of Calgary with the same westerly headwinds with the 35” KO3’s. My gas mileage read 13.5L/100 (17.4 mpg) !!
I can’t come up with proof as to why other than the science behind the new tread pattern changed the rolling resistance of the new tires.
People care too much about load range when it comes to ride. These aren't 2-3k pound jeeps anymore, they're 5-6.5k pound vehicles so if you set the pressure right for the load they'll ride fine.
The “tire place” won’t go back to manufacture and raise a warrantable claim for you? They must see there was a defect in making them. The PSI sounds about right. I chaulk tested mine to 32 up front and 30 in the back. I wanted the 315/75/17 but could only get the 70/17 but I’ve been back twice for rebalance to get the very slight shimmy at 100-120 km/hour and it can’t balance so on Monday I’m going to the dealership to have them “road force” balanced. If they still shimmy after that, they are going back to my tire place to get swapped out.
You might not be wrong, but decades of begging for C rated tires on my Jeep is a hard custom to cut out …
I’m at the dealership getting my 5 KO3’s road force balanced because of a very slight shimmy felt at 100km/hour and quite shaky at 120. The tire store rebalanced twice to no avail, hence getting the road force balance.
