(engine shutting down)
- It sounds cool, but sure does look like a grandpa truck.
- I know.
- We can fix that.
- We can.
- We're gonna. (beep)
Hey guys, Shawn again, Custom Offsets,
Custom Offsets TV on the YouTube.
Got another episode of shit I never knew,
this is gonna be episode number 16.
And this is underrated tires that are overrated.
We've had a billion questions and manufacturer feedback
and we've reached out to a couple of folks
to get some insight on it.
To really try to figure out
what tire rating should you be running,
especially on these 3/4 tons and one ton trucks.
So these are two different examples that we'll run through
and we'll kinda show you how we would do it
if we were in both situations.
So in this situation, it's a newer Super Duty
so it still has the factory tires on it
or it was replaced with exactly what the factory came with.
So on this scenario, all I have to do
is keep looking around here,
and typically it's right by the size.
So I found the size is 275/70R18,
right after that are two numbers,
this one says 125/122R
What that is is that's the load index.
Remember that. You're gonna want to know that for later.
So 125 is the load index if it's run all by itself.
122 is the load index if it's run as a dually
and it were side-by-side with another tire in the rear.
So this is the type of tire, whey they have two numbers,
that can be used for a dually application.
So this is load index 125.
If I were to go over here just to verify,
there's also a placard on the truck,
a sticker in the door pillar,
and that's got the original tire size
and because it's a newer truck,
it's also got the load index right there on the sticker.
Now the other scenario would be
if you're driving a mean-machine like this guy here,
and it's a '05 older vehicle.
This one obviously no longer has the stock tires,
so I don't want to go off what somebody else put on here
to try to figure out what I'm able to run on it.
So what I would have to do is go, again to the sticker.
And this one's got a pillar sticker
and also one on the door.
The one on the door has more information.
But this one when I look through,
it'll tell me the PSI that it wants to run at
and it'll tell me the tire size,
but it's not telling me the load index anywhere.
The only things that I can grab off of this one,
there's a gross vehicle weight rating
and then there's a gross axle weight rating
for the front and for the rear.
I'll show you, now, we'll go back look at the board
and kinda lay out what that means
that you would do with those numbers.
So what I'm gonna do is I'm gonna take a picture,
nope I didn't bring my camera
so I'm gonna have to remember it.
So I've got a gross axle...
you have to remember this with me Mario,
are you with me?
Gross axle weight rating for the rear,
which is the higher one,
obviously the front doesn't matter if the rear's
gonna be higher because they have to at least meet the rear,
is 5,000 pounds.
So we'll remember that and then the load index
for that guy was 125.
So let's go start doing some math
and see what we come out with.
So basically, you can...we'll break out our two scenarios.
So we have one scenario
which is the newer Super Duty
and we were able to find load index
which is the best and the be all, and that was 125/122.
And on the Hummer,
we couldn't find load index,
so ideally we'd have found load index.
Can't find it.
So we had gross vehicle weight rating, 1
that's not safe because you really need
the gross axle weight rating for the rear,
because the rear was 5,000.
What was interesting is the front was only 4,000
so if you divide by two, you can find out what each tire
needs to be rated for.
And this is why the rear is important,
because if you bought tires rated for 2,000 pounds
you're gonna be in trouble when you flip 'em to the rear.
So that's not valuable.
The number that's valuable now is 2,500 pounds
on the Hummer.
So we'll start with the Super Duty,
and we'll show you what you'd want to do there.
These are super easy because you basically
are working with load index.
Load index is nothing more...
there's my phone I was looking for.
Load index is nothing more,
and you can google this pretty much anywhere,
maybe we'll throw one on the website for you.
But I can google just about anywhere
what that load index table looks like.
And I can find out what that means,
the weight rating is gonna be for those tires.
So it's a 125 it's requiring,
that means that trucks looking for 3,638
per tire and that's pounds.
And then other thing that's really important
is you have to look at the air temperature
and that one was at 80 PSI.
And that Hummer was, what'd we say,
was 32 I think...37.
We'll go with 37.
I'd have to go look at it to make sure
but it was around 30 or 37,
and that one were at 25 pounds.
So what we've done is we've basically converted
the load index to pounds.
But the great news is you don't have to do that.
So when you start looking at tires on the website
or if you start looking at 'em in person,
every tires is marked with that weight rating.
So if I look at this Atturo AZ800,
which is more of an all-terrain tire...
can you see that okay Mario?
Yeah?
That's a 112.
So that 112, there's no way it's going on a 125.
You have to be at that number, or higher.
So that 112 if you go throw that on that Super Duty,
is severely underrated
and you're gonna have a major problem.
Um, probably have a blowout.
It'll basically take the sidewalls
out of the tire most likely.
And wipe out whole minivans full of kids.
So it's not advised.
So that's a 112, that one's rated at 2,469 pounds.
We're looking for 3,638 pounds.
That's not even in the ballpark.
So as I go through this huge pile of tires,
I'll start at this end.
I've got the Toyo Open Country A/T II Extreme.
This tire has been around for quite a while.
It's a badass tire.
The extreme is the A/T II, is the newest rendition of it.
And you can see that this one
is a 123.
So 123, I can either go on the website,
And we actually have the load rating.
You already know that it's not 125,
so it's not gonna work for that Super Duty.
And the reason is, that can only handle 3,417.
So we're still short of that 3,638.
So that one's a no go.
Even though, and here's what's interesting,
this is a load E, it's a 10-ply,
you can run it up to 80 PSI.
So there are lots of people running these on Super Duties.
This tire is not rated for that Super Duty.
So even though this tire is run all over
the place on Super Duties,
at 123 it does not meet the manufacturer's requirements
for that vehicle.
So if that vehicle were maxed out,
to be pulling what it's set up to pull,
you would be in trouble likely
on the rear axle on the rear tires.
So that one's not gonna cut it.
This one's not gonna cut it.
We already went through the Atturo AZ.
Uh, next is the Nitto 420.
How many Super Duties have you seen
running around with the Nitto 420s.
Well, this one's rated at 120, we're looking for 125.
So that one ain't gonna cut it.
If you run that you're 3,086,
you're 1,000 pounds or 25% underrated on your tires.
So if you try to use that vehicle to it's potential,
you are definitely gonna have problems.
This one this Federal Couragia,
I grabbed this one cause it's an 18.
So I see the load index of 119,
so that one's not even close.
Here's our Atturo Trail Blade M/T,
I see lots of guys runnin' these on Super Duties,
and to be honest with you,
this one's a load index...
They can be tricky to find.
But you're literally looking for three numbers.
123, so 125 that one's not going on there.
Now remember, this is if you're following
the manufacturer's specifications.
I've said it once, I've said it twice,
I've said it 1,000 times.
Do what you want.
You're gonna anyways.
But this is what you're supposed to be doing.
So are there guys out there that are going to say
I need a 125 but this a 123.
Let's see what the 123 goes up to for weight
if I look at the table.
You're at 3,417.
So you're at 3,417, the truck is telling you
to have 3,638.
It requires a 10% barrier,
So you're lookin' for 4,000.
And basically if you go with that tire
you're settling for 3,417.
So you're about 600 pounds,
What is that about probably 15% under the rating.
So this one is a Toyo Open Country R/T, a fairly new tire.
That's a 121, so that one doesn't work.
And you know what's amazing is, everyone of these
are being run on Super Duties all over the place.
So, I'm not saying people don't do it,
I'm saying that ideally you wouldn't.
So here's the Nitto Ridge Grappler,
this F loaded, or uh,
yeah F load.
Uh, load F, 12-ply.
So this is a new tire, they just came out with it
not to long ago.
Most of the Ridge Grapplers are F loaded.
If you look on the website you'll see which ones are.
This guy is a 126Q.
This can absolutely be run on that truck
because we need a 125 and that's a 126.
This one, which we're jacked about coming out,
this is also F loaded,
this is the Toyo Open Country M/T,
but the M/T that we pushed over there
that wasn't loaded enough...
Maybe we didn't push one over there, oh, it's in the corner.
Um, this is F loaded.
So it's the same tire but it's a 12-ply
and this one runs at a 125Q, or 125.
So that one's gonna work.
So out of all these tires, these are the two.
If you are following the rules to a T
and you're gonna follow that load index
and that load rating for that rear axle.
Cool, you believe me Mario?
(indistinct response) Alright.
So, that would be your options;
basically F load 12-ply, if you're gonna follow the rules
on the Super Duty.
Let's look at the Hummer.
So remember the Hummer, we didn't have the load index.
Gross Vehicle Weight isn't worth going at.
The front axle doesn't matter
cause the rear axle needs more.
On the rears it was 5,000 pounds or 2,500.
You remember we need to go 10% over that.
So that'd be another 250, so we need 2,750.
So this is when I don't have a load index
and I've got to come up with it.
And it was at 37 PSI.
So now what I would wanna do
is basically go find one of those charts,
and convert to a load index,
so that I can use that load index, that three digit,
would be the fastest to be honest with you.
2,756 would be a 116.
So you're lookin' for a 116 load index.
So now you start the game all over again.
116 would be 2670...oh
no it's 2,756.
So it's it's 2,756, so that over shoots my 10%
on my rear axle, divided by two,
because there's two tires on the rear axle.
Cause this is, remember this is a per tire rating.
So obviously I can run those on the Hummer
because of the F load and those guys were well over 116.
And then I start the game over again.
So this one,
is a 121.
I can run this on the hummer.
And that's a Toyo Open Country R/T.
This is our Atturo 37 inch M/T.
What was this guy?
A 123, I can run that one on the Hummer all day.
This was our 8-ply Federal Couragia,
119,
so this one says I can run that,
now the question is, because it's 8-ply
I'm surprised to see that.
So let's look up at what air pressure
is it getting to that.
Because that's the other thing,
is that you have to consider
at what PSI is it making that weight?
So I would go and find that Federal Couragia
on our website.
So I just go to CustomOffsets.com, products,
wheels and tires, search by tire diameter,
this is an 18 inch,
I think it was like a 285...
275, so height is 275,
brand is Federal,
and then I find that Couragia M/T for the model.
And this is an LT, this is a light truck tire,
so it's not a P, passenger tire.
So it's why it's got that higher rating.
D rating, 8-ply, 2,998 at 65 pounds.
So what it's telling me is to get that 2,750
I would need to be running this at probably 50-55 pounds.
So you'd want to do more math
because if you run this at 37 PSI,
which is what it wants you to be at 2,750,
you're not gonna be at 2,750 at 37 PSI
when this thing is only rated at
what I say it was rated at,
2,998 at 65 pounds.
So this ones starting to dance on the edge.
So when you're starting to play close to that number
then you have to play the PSI game.
Is it rated at 37 PSI,
which is what that truck's calling for?
Is it still rated to match?
So this one I wouldn't run cause it's an 8-ply
on an H2 heavy-ass Hummer, and it's right on the edge.
Nitto 420, that's a 120H.
That one again is close.
120 sounds pretty good.
So again, I'm gonna go off to the website.
I'm gonna do a new tire search, and I'm gonna look that up.
305...
50...
And that was a Nitto...
420s.
325/50...
I mean 305/50.
So that one's at max load would be 3,086 at 50 pounds.
3,086, we're lookin' for 2,750
at 50 pounds.
That one's gonna be close.
I would be comfortable running that on that Hummer
because it's that close.
I don't know if that's exact math,
you guys can dig deeper if you care to that extent.
My goal is to help you not have grossly underrated tires,
so that you wipe out families full of...
Minivans full of families.
So this is just to get you into the ballpark.
So the Atturo is 112, we're looking for 116.
Not gonna cut it.
This is our Toyo Open Country A/T II,
that's a 123, that blows the 116 right out of the water,
and I know that that one will run it.
Might as well pull this guy out of hibernation.
This is Toyo Open Country M/T.
Load range E and
he is a 114.
114, so this one's underrated.
I didn't see that coming.
So this Toyo Open Country M/T that I've had forever,
and the new M/Ts might be higher than that
even in the 10-ply, but this old one's only a 114.
I'm gonna look on the website
and see if they're still that low.
So that's a 33...
12 and 1/2....
20...
Toyo... Open Country.
They now are a 114, so they would still be underrated.
So the Toyo Open Country M/T would definitely be underrated.
It's only at 2,600 pounds at 65 PSI,
and we need 2,750 at half that PSI.
So those are absolutely underrated.
So these guys, did not make the cut either.
So on that Hummer, I could run any of these
and I would feel safe doing it.
Um, the closest one being the Nitto 420,
but it is a load E, 10-ply light truck tire, right?
Wanna make sure I'm not lying.
Cause you can find all the information on the sidewall.
So it's a 120 index,
or you can go to the website if you get tired
of reading small writing.
Which is the point that I'm at already.
I don't have patience with it.
So I'll just go back to my Nitto 420,
and I'll be able to look at it.
The only thing I want to make sure is that
that is a load E.
Cause I don't want to run a non-load E on
a big heavy H2 Hummer.
(humming)
So that's at 3086 at 50 pounds, so that's good.
120 is the index, that's good.
I don't think, oh, the mud tires are the ones
that are running the loads.
That one doesn't have a load range.
At not listed that I...
So based on the information that I have,
I wouldn't be afraid to run that one.
At least from what I've learned.
So, you know, that's as much shit as I know
about load index, load rating, gross axle weight ratings.
I would run any one of these on that H2.
I'm actually gonna leave here now,
and go look at the tires I have on the H2
and see if I've broken the rules.
It is what it is.
You're gonna do what you're gonna do.
I'm moving all these tires back out over by my bunk bed.
And that's the shit that I know
about underrated tires are overrated.
So, piece.
(rock music)
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