Need Some advice on 19.5 tires

[EricBu12]

I pretty much know what I want in the rims and such, Also the Michelin XDE MS style.



I heard the 225/70-19. 5 is pretty much the same size as the 265/75-16. I have a fairly heavy 5th and the Rear ratio is the 3. 55's



I was thinking of getting the 245/70-19. 5 size for the 4080# rating instead of the 3640 for the 225's



Would this size be too bad for pulling the 5th? Make the ratio even higher so it would be harder to pull?



If I get the 245's, How much would it be to get the 4:10's installed?

 

[chuckwilson]

I got my 19. 5s 3 years ago from duel designs and they told me that going up to 19. 5s is like going from 4. 10 ratio to 3. 55 ratio. my truck has a banks power pack and ATS trans with a triple lok converter, and 3. 55 ratio I pull a 34' race car trailer with no problems.

 

[Loren]

Eric,



Your truck is very similar to mine. I have a 2000, 2500, Quad-Cab, short bed, 4x4 with the 3. 54 differential ratio.



My truck came with Michelin LTX A/S 265/75R16 - Load Range E tires.

I installed Toyo M-608Z 245/70R19. 5 - Load Range G tires.



At 60 mph with the stock tires my engine was turning at 1650 rpm. After the switch to the 245/70R19. 5's it turned 1600 rpm at the same speed. There was a difference, but it was so slight that I had to measure it. I couldn't tell by just driving the truck.



You can calculate the change in gearing by looking up the revolutions per mile figures for the tires in question. The figures for the tires sold by Rickson are found at his web site. You may be able to get the Michelin numbers from their web site, or a dealer, or even from Rickson.



If the factory tires turn 630 revolutions per mile and the replacement tires turn 605 revolutions per mile, then after the switch your engine rpm should drop to:

605/630 = 0. 96 (or 96%) of its previous value.



If your engine was turning at 1650 rpm at 60 mph, then after the switch it will be turning 1650 x 0. 96 = 1584.



In my case, I was seeking higher gearing but was disappointed; the gearing change wasn't enough to matter. I eventually added a US Gear overdrive.



Regarding switching to 4. 10 ratio differentials, I would say that the cost would be prohibitive. You can always just shift to a lower gear. If a full step is too much, a US Gear overdrive or underdrive would cost less than changing two differentials, I'd guess, and it will allow you to get an extra selection between each of your current gears.



Loren

 

[EricBu12]

Thanks for the info loren. I know yours was powder coated but would the chrome rims be powder coated on the inside?



The difference of the chrome rims verses the For. Alum. is 1. 2" So your truck had the tires stick out 1/4" more than stock on the steel rims..... that is 1. 41" offset verses the 1. 7" offset Stock rims



The alum. rims have a offset of . 25" that makes it stick out 1. 2" further than your steel rims reguardless of the width of the tires. Think I'll get the steel chrome rims from ricksons and tires all in one and such. I apreciate the offer on your coated rims and simulators.



Eric

 

[BPINE]

Eric don't get the Michelin XDE MS they are junk !!! The tread is to tall and the truck wonders bad. I have over 10k on mine and it is still no good. You also can't keep them in balance worth a crap.

 

[Loren]

Thanks for the info loren. I know yours was powder coated but would the chrome rims be powder coated on the inside?



The difference of the chrome rims verses the For. Alum. is 1. 2" So your truck had the tires stick out 1/4" more than stock on the steel rims..... that is 1. 41" offset verses the 1. 7" offset Stock rims



The alum. rims have a offset of . 25" that makes it stick out 1. 2" further than your steel rims reguardless of the width of the tires. Think I'll get the steel chrome rims from ricksons and tires all in one and such. I apreciate the offer on your coated rims and simulators.



Eric

Eric,



I don't know about powder coating, but I would ASSUME (you should check) that the chrome-plated wheels would be chrome-plated inside too.



Yes, the wheels themselves will stick out farther, measured to the center of the wheel. But... If you measure to the outside edge of the tire, the narrower 245/70R19. 5 tires will protrude only 1/4" more than the stock 265/75R16 tires.



Loren

 

[Vaughn MacKenzie]

Eric if you thought about 225s check here--> http://www.dieseltruckresource.com/classifieds/showproduct.php?product=1328&sort=1&cat=7&page=1

 

[Cattletrkr]

If you go with the XDE's, get the 225's. Rickson has the 245's listed as either load range "F" or "H", but Micheln has them listed ONLY as "H", and that's what mine are. Way too heavy. 225's in LR F would be plenty for any p/u. No need for a tire that heavy on a p/u and you can feel the weight when you're driving. I've heard good things about the Goodyear G124's from my local tire guy. I'll probably go with those next time.



BPINE--10K and still squishy? That should go away with time and the longer it takes the better. That just means they're lasting a long time. I don't like the wander either, though. Kinda difficult to keep straight with 27k of cattle and trailer pushing me around a rough corner on the freeway.

 

[BPINE]

BPINE--10K and still squishy? That should go away with time and the longer it takes the better. That just means they're lasting a long time. I don't like the wander either, though. Kinda difficult to keep straight with 27k of cattle and trailer pushing me around a rough corner on the freeway.

Cattletrkr you might be right in saying the longer it takes to go away the longer they will last but it drives like crap !!!! Just thought Eric should know that and I don't mean that in a negative way towards you.

 

[Cattletrkr]

All's well...

... and I don't mean that in a negative way towards you.

Don't worry, I certainly didn't take it as a personal shot Now, if you would have said, "Hey dumb***** cattleguy, those tires suck. You're a moron for getting them... " Then we might have a problem. :-{}

 

[BPINE]

Don't worry, I certainly didn't take it as a personal shot Now, if you would have said, "Hey dumb***** cattleguy, those tires suck. You're a moron for getting them... " Then we might have a problem. :-{}

So you have these same tires then, if so how many miles do you have on them. Mine sure look good but I just am not that happy at this point.

 

[EricBu12]

I drive a big truck for a living so squishy tires is normal to me :-laf



Now I haven't looked at the side of the rims and haven't tried to measure the offset and to see what it would look like if I had the Aluminum Rims.



Vaughn, I don't want straight rib tires like that... .



I think the 225's are for me in the F rate. I like the Tred of the michelins. If the Aluminum Rims stick out a little, would that make the truck have a little more stability with a heavy load?



Would you notice the difference? There is only 30# difference on the rims but are much more expensive... .



The other reason I am considering the Aluminums is I live in Salt Lake City so snow and salt are here for sure... .



So Now, the Aluminums are 1. 4" further out, the tires are narrower than stock 16". Would the aluminum rims with 225's tires be less than the 1. 4" offset like maybe 1" ?

 

[Beast2B]

I've heard good things about the Goodyear G124's from my local tire guy. I'll probably go with those next time.

I run the G124 on my work F450 4x4. They are rated for front and rear, but they wander A LOT on the front. I went back to a M/S highway tire on front, G647 RSA, and I'm way happier.

 

[Cattletrkr]

So you have these same tires then, if so how many miles do you have on them. Mine sure look good but I just am not that happy at this point.

I've only got about 1,000 miles on them so far. Should start getting busy soon so the miles will start adding up. The only thing I don't like about them is the weight. I didn't realize I was putting 16ply tires on the p/u. Way too much weight. Rides unnecessarily rough. The wander will eventually disappear. It's a problem with any new tire that has any amount of tread.



Beast2B, that's different from what I'm seeing. I can't tell any difference on the front, just that the rears wander. I'll write down that tire recommendation for future reference. Thanks.

 

[Beast2B]

Maybe it's the roads. At anywhere from 55-80psi it wants to drift, worse when towing a 10k Sno-Cat trailer. I didn't notice much on the rears, keep them around 75psi. Real happy with the wear and they do quite well in minor off-road driving. Truck weighs in at 9800lbs as driven daily with a service bed and the 10k bumper pull trailer is the biggest load it gets. Our company "standard" is that a truck can only haul a trailer up to 1/2 of its GVWR...

 

[EricBu12]

ok, Now I am looking at the Goodyear G-124's. I find the tread is a little shorter so the squishiness <---That a word? will be less. I tow a toyhauler off-road so I need traction in dirt and in winter, we have snow and ice so i need MS rated tires. And The Goodyears are cheaper. I think I will get the aluminum rims as well. just 50 some dollars more for them each... .