LRR tires such as Mich Latitude Tour or General Grabber HTS?

Anyone here using any LRR tires such as the Latitude Tour or Grabber HTS on their KJ? I'm thinking of going back to a more stock type tire when I change mine next. Just wondering if these LRR tires make much difference on the KJ, or if it's more of a marketing ploy? If so, what are you running and how much MPG have you picked up because of them?

:smokin:

Michelin makes the best low rolling resistance tires in the big truck market by far, they actually do proper testing of their tires, and the competitors to prove it.

Dunno about the grabbers, but many of the goodyear "fuelmax" tires, have horrible rolling resistance.

desync0 said:

but many of the goodyear "fuelmax" tires, have horrible rolling resistance.

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Don't know if I could be talked into another set of GY tires. The Michelins I've owned were always VERY good.

I just wonder if there really is much to the whole LRR thing when it comes to the SUV tires sizes? Like you mention about the "fuelmax" tires... do they just sprinkle a little of the magic LRR pixie dust in the formula and claim they save on fuel? Or is there a substantial enough difference over something like the Firestone Destination LE or even the stock GY Wrangler ST's?

My KJ would get 21-22 and as much as 24 on the ST's. With the Falken AT's it's down to 15-17. Of course this is highway and comparable driving habits.

First off you have something wrong with your Jeep if you are getting 15-17 highway
with a 245/70 AT
Our KJ at 70K was getting 15-17 mixed driving on 245/75 MTR's
Second that LRR is just smoke and mirrors
you want good MPG dont drive a Jeep
Just
Empty
Every
Pocket

J-Thompson said:

First off you have something wrong with your Jeep if you are getting 15-17 highway
with a 245/70 AT
Our KJ at 70K was getting 15-17 mixed driving on 245/75 MTR's
Second that LRR is just smoke and mirrors
you want good MPG dont drive a Jeep
Just
Empty
Every
Pocket

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No, there's nothing wrong with the Jeep. The change occurred with the change of tire type.

245-70s should not change the mileage one bit really unless you had went to a very heavy 6 ply tire with aggressive tread. I never noticed a difference in mileage when I went to the 245-0s, 255-70s, 245-75s or 265-70s, now with the 265-75s I get only an average of 20.2 on the highway, down from the 22.5 I used to get

tommudd said:

245-70s should not change the mileage one bit really unless you had went to a very heavy 6 ply tire with aggressive tread. I never noticed a difference in mileage when I went to the 245-0s, 255-70s, 245-75s or 265-70s, now with the 265-75s I get only an average of 20.2 on the highway, down from the 22.5 I used to get

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Well that's how I thought it should be too. The only thing I can contribute this to is the tire design. The Falken's are pretty aggressive for an A/T, but certainly not as much so as a mudder.

I've had these tires on since late last fall, early winter. There was a pretty immediate decrease, and it's been on a very slight downhill decrease since then. Other than busted window regs, there's been no issues with this thing. It runs like a top.

I'm going to change the plugs, fuel filter, ****** and t-case fluids, and other maintenance stuff with the next oil change. These tires will stay on thru the winter. Next spring I'm going back to a stock type tire, or something else.

How long has it been since you did a tuneup on it, could be the problem right there. KJs seem to like new plugs every 20/25,000 miles
Airfilter makes a huge difference as well
Winter I can see as with the additives you get less mileage

tommudd said:

How long has it been since you did a tuneup on it, could be the problem right there. KJs seem to like new plugs every 20/25,000 miles
Airfilter makes a huge difference as well
Winter I can see as with the additives you get less mileage

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Never. It just rolled over 29xxx. Was going to wait till 30xxx. I'll do it next weekend.

guitarzan said:

No, there's nothing wrong with the Jeep. The change occurred with the change of tire type.

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Dude there is a problem
my 9000# F250 gets 12-14 highway
you should get at least 20

I have Michelin Cross Terrains on mine....they are good for MPG, but crap otherwise. Noisy too for being a highway tire.

I have the General Grabber HTS in 235/70-16 on my '05 Renegade, they're a good general purpose tire, ride nice, and showing very little signs of wear with 10,000 miles on them.
I would say they are a very good road tire, but have their limitations off road, they work well in beach sand, limited ability on gravel, suck in the mud, but do a fair job handling snow.

I'd be willing to bet your problem has more to do with the need of a plug change than your tires, I waited til I had 29,000 on mine, and saw a world of difference with a new set of Autolite Double Platinum's.....

Got a new set of Autolite double platinums in today. Man, what a piece of cake to change those plugs... much easier than even some of the 60's cars I've owned.

The old plugs looked pretty good. The gap was off about .005 on one of them, but the rest were only about .002 or less out of spec. All looked like the "burn" was even. But the engine seems a LOT smoother with these plugs, and maybe just a bit zippier. At idle it almost takes looking at the tach to see if it's running. So these have got to make at least a little difference in performance.

guitarzan said:

Got a new set of Autolite double platinums in today. Man, what a piece of cake to change those plugs... much easier than even some of the 60's cars I've owned.

The old plugs looked pretty good. The gap was off about .005 on one of them, but the rest were only about .002 or less out of spec. All looked like the "burn" was even. But the engine seems a LOT smoother with these plugs, and maybe just a bit zippier. At idle it almost takes looking at the tach to see if it's running. So these have got to make at least a little difference in performance.

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I change plugs every 30,000 miles on my KJ 3.7L. Really makes a difference.

I'm a newby and not entirely sure what 'LRR' is supposed to mean, but last fall I had a set of Michelin - LTX® A/T2 (235/70R16) installed on my '05 KJ. I'm very happy with them and will be installing them on my'06 KJ before winter.

Hey Guitarzan, just noticed we're practically neighbors!

KJJ said:

I'm a newby and not entirely sure what 'LRR' is supposed to mean

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Low Rolling Resistance

Sorry, cannot really help too much in regards to LRR tires, but we got pretty decent mpg with the old Hankook ATM RF10 tires!
However, even with Goodyear M/T R's we run now get better mpg than what you are getting!

Way back when in the mid-90's, I was involved with the hobbyist electric vehicle crowd - ones that take a used pickup or car and convert it over to electric on their own - and they were into LRR tires big time.

At one of their meets, I spoke with a gent that worked for Goodyear about LRR tires.

He said it wasn't just enough to buy a tire with the rubber compounds and tread design optimized for LRR - there were other items you needed to look at as well.

One was vehicle weight versus the rated weight capacity of the tires. You take the rated weight capacity of one tire, multiply by 4, and compare the total weight capacity of all 4 tires against the vehicle weight - if the vehicle weight was 60% OR LESS of the total weight rating of all 4 tires, then you could get the max benefit from a set of tires designed for LRR. Above 60% and you wouldn't see much if any benefit - the sidewalls would be deforming and mushing from the tires trying to support the vehicle as it was driving down the road.

Another was the aspect ratio of the tire. For the same overall diameter and weight rating, a wide tire with a short sidewall would actually have less rolling resistance than a narrow tire with a tall sidewall - sidewall flex being a major part of rolling resistance - and the tread would flex less as well from the weight being distributed over a wider area.

And yes, inflation pressure as well - not just checking to see they're aired up properly - but that a 44 psi tire would be preferable over a 35 psi rated tire.

Years ago on my old computer, I had a link to the website for one of the cottage electric vehicle parts suppliers - thay had a calculator on their website where you could put in all the pertinent info and it would calculate the rolling resistance for different size tires for your vehicle.

Driving style will affect your MPG's more than going back to "stock" tires. Drive like you're 90, new spark plugs, and air filter and you'll get better MPG's for your buck.

VeitzJeep said:

Driving style will affect your MPG's more than going back to "stock" tires. Drive like you're 90, new spark plugs, and air filter and you'll get better MPG's for your buck.

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Only for a little while,then carbon builtup sets in and you will get worse mpg's.Gotta "Clean the cobwebs out" at least once a week for at least 30-60mins to keep carbon buildup to a min.