- - [Alex] Hey guys what's going on?
It's Alex from Fitment Industries and today we're gonna be talking about one of the most
hotly debated conversation starters, questions, comments, things that you guys ask us about
nothing more than stretched tires.
Now before we get into it we do wanna say our lawyers made us say this because they're
boring and lame and get they paid way more than I do that if you stretch your tires you
do have to remember that you increase the risk of debeading your tire and safety.
So be sure that if you're going to stretch your tires that we are out of the mix when
it comes down to liability in whether you choose to do it or not is entirely your call.
Whether you choose to purchase them or not is entirely your call.
We are just here to tell you how to calculate stretch but once you do the purchase and the
things with the stretched tires completely out of our control.
We're gonna pretend like we don't even know you.
Before we get into it don't forget to subscribe.
I'm Alex from Fitment Industries and let's get right into it.
When you calculate stretch it's very difficult to do.
Now we have a calculator and different things on our set.
We even have a gallery where we can look and see what stretched tires look like.
But at the end of the day, it's very hard to actually calculate stretch.
Everybody has a different definition of what a stretched tire is.
So we decided to browse the forums, browse Facebook and ask a bunch of people, cause
we you know we know a couple people, on how they calculate stretch and how people like
just you and me can get down to it and figure how to calculate stretch with nothing more
than pretty much a pencil and a piece of paper.
And we did.
So we wanted to give credit to the guy named H3LLK1T3.
He's on a forum that actually calculated stretch and found a very good way to go about it that
we wanted to pass on to you guys.
So again H3LLK1T3, I don't know his actual name, thank you for doing all the work that
you did.
We are going to help these guys figure out how to calculate stretch as well.
And we will actually drop the original thread in a post description thing below.
But of course let's get right into it.
So this system is gonna work for most wheel set ups.
Now diameter really doesn't matter so if you have a thirteen or a twenty three it's not
gonna change anything.
What is gonna change is the width and we're gonna get into that.
We're gonna break this down into what we call stages so we're gonna have stages of stretching
from down all the way up in terms of "meaty" stretches.
So we're gonna start off with just the basics which is a two fifty five thirty five tire
on an 18X10.
So a two fifty five thirty five tire on an 18X10 is actually almost the exact perfect
set up for a square set up.
If you take the two fifty five, you turn that into inches, you're getting roughly around
ten inches exactly and that thirty five side wall is almost identically perfect to a straight
up and down side wall on a ten wide.
And with how we do the stages, you use the two fifty five thirty five on an 18X10 to
essentially set up your base line, where if we go down an aspect ratio or we go down a
tire size that's how we're going to get our stages of stretching.
And if we go up in tire size or we go down in width but we stay in our tire size in terms
of a wider tire smaller width wheel, we also get that meaty stage set up as we go into
the future.
So the two fifty five thirty five is what we'll call a stage zero.
It's a neutral spot for you to calculate your stretch.
Now if you go into how you're going to go down, you're gonna wanna remember that section
changes go in intervals of ten, and side volt changes in interval of five.
Meaning if you go from a two fifty five to a two forty five that is one stage of stretch.
If you go from a two fifty five thirty five to two fifty five thirty, that is also one
stage of stretch so just take that into consideration.
A two forty five thirty five on a ten wide would be a stage one stretch, that would be
a mild stretch.
A two thirty five thirty five on a ten wide would be a stage two stretch.
On a two twenty five thirty five you'd be looking at a stage three which would be a
full stretch.
Now that would be about as far as you could actually go in terms of stretching out your
tires.
There's very few tires you can go to a stage four.
And by then you are dealing with some severe debeading issues and a whole bunch of mess
that we will not even get into.
Now if we go back you can actually run a two twenty five forty which brings you back up
to stage two stretch.
Because what were doing is, because we went down in the overall section width of your
tire but we went up in aspect ratio, you're essentially doing pluses and minuses overall
to get to what stage stretch you're doing.
So you might want to redo that all over again, you can watch it over but trust me it's completely
worth it because since you're going down in sections of ten that gives you one stage of
stretch.
If you go down five in terms of your width your aspect ratio of your tire that is also
one stage of stretch.
I don't know why I'm doing so much with my hands but it helps me articulate what I'm
trying to say.
And remember that this math works backswords as well, so if you have a two fifty five thirty
five on a ten wad and you wanna go slightly meatier than just the straight up and down
look you can go up to a two sixty five thirty five for what we will call a stage one meaty
look.
We don't really have a better name for it and the more I say meaty the weirder it sounds,
but it goes for the same way.
Two fifty five forty would also give you a stage one "meaty" look.
Now we described a two thirty five thirty five and a two twenty five forty as a stage
two stretch and you're like how does that work?
Well the reason that that works out to be the same size of stretch is because of how
the aspect ratio works with your section width, meaning that because you have more side wall
on that forty series that it's gonna bend in just as much as a wider wheel would with
less of an aspect ratio on the side.
So trust me now this isn't exact math, but this is gonna get you as close as you could
possibly get to calculating out your stretch and we're gonna put some pictures during this
video so you can kinda see what it looks like.
Now if you wanna go out and actually just see what a two thirty five twenty five eighteen
looks like on a ten wide wheel, you can go out to our gallery fitmentindustries.com and
enter in that tire information and you'll be able to see exactly what it looks like
on thousands of vehicles.
That's the whole reason that we have the gallery.
It's why we want you to add to the gallery so that we can get other people the fitment
that they want.
Now one very important thing to remember is that if you choose to use your aspect ratio,
your side wall, as how you're going to stretch up or stretch down your tire, you have to
remember that the higher number you go like a forty versus a thirty five the wheel will
sit taller than a thirty five side wall and that just has to do with the fact of your
inflation and a couple other things.
So if you're looking to make sure you can get as close as you possibly can to the ground
or maybe you're trying to get that perfect thunderlook you will want to use the overall
section width, that would be the actual width of your tire as your "stretch stages" instead
of your side wall.
Now you can do both but again we don't recommend going past three stages of stretching.
- [Alex] He's probably actually like working.
Now we're gonna add one more level of confusion because in case you weren't confused yet my
goal is son of a [Bleep].
So in case that hasn't been confusing enough we have another level of complication to add
to this.
Now you remember if you go down ten in your section width you essentially get one stage
of stretch.
Or if you go down five in your aspect ratio you'll also go down in one size of stretch.
Now you can also attribute that to the width of your wheels, meaning that if you had a
two fifty five thirty five on a 18X10, which is our square set up, remember that's our
baseline.
And we choose to go up to a ten and a half versus a ten, we now have also accomplished
one level of stretch.
Every half inch of width of your wheel is also going to be another variable that can
essentially go to one stage of stretch or one stage of meatiness depending on which
way you go.
So you have three different things that can essentially attribute to the stretch look
of your tire.
So a couple great baselines for I would say a stage zero is going to be your 18X9 two
twenty five forty and an 18X9 two thirty five thirty five.
So remember that's gonna give you that nice up and down look which actually looks pretty
good on a lot of sport hatches and BRZ FRS'.
It's gonna be a great starting point.
Now if you're looking to get into the math you can use some of those numbers I just said
to start your baseline.
Now stage one is what we call a mild stretch, meaning that it's what you're gonna get away
with if the police actually care about your stretch tires.
It's gonna be something you're gonna be able to get away with with a little bit of a sportier
look but still be able to tuck your wheel inside your fender if you're getting really
close to that fender and you decide to roll it.
So we're gonna give you a couple numbers on what we would call a "stage one" stretch.
Some examples of those numbers include and 18X10 two forty five thirty five and a 17X11
two fifty five forty.
If you go up to a stage two we'll call that "max stretch" or solid stretch depending on
how crazy you decide you want to be.
But a stage two stretch is where you're gonna start to see that tire pull away from the
wheel.
You're gonna start to see the lip of the wheel.
And of course we're gonna give you that disclaimer again if you stretch your tires you risk debeading,
all that lawyer stuff, we're not liable if anything happens or if your tire blows up
and blah Stage two is gonna be taking that another step further and that's what a lot
of people, we would say ninety percent of the people want when we say they want a "stretched
set up".
Especially in our emails.
Most are talking about a stage two stretch.
You will see a lot of people that run a stage two stretch do have curb rash and it has a
lot to do with the fact that people don't think that they ever curb their wheels until
they realize that they pull their tire away and they run into things a lot more common
than they think.
So just take that into con if you choose to do a stage two stretch.
You're risking a lot but if you risk it for the biscuit and that's what you want we'll
give you some examples of tire set ups that are stage two.
Two examples of that include and 18X12 two eighty five thirty and a 15X9 one ninety five
forty five.
So you can use those two numbers as examples for your stage two stretch and then attribute
to what your set up is going to be and that will give you what stage stretch you want.
And finally we have what we would call a stage three stretch.
Now this is about as extreme as you get.
We are not liable.
We are not responsible.
We are not gonna tell you that you should do this.
We're not anything of that.
But if you wanna know what the maximum stretches for what a lot of people do in the scene that
we do not condone because we are a business and we are not liable for that sort of stuff.
This is what it sits at.
Some examples of a stage three stretch what we call a full stretch would be an 18X10.5
two twenty five forty, a 19X14 three fifteen thirty a 16X11 two twenty five forty five.
Now for stage four set ups you are absolutely not going to want to do that ever so we're
not even gonna talk about it.
Don't do it.
Just don't.
Don't do it.
And then obviously since we go back into an 18X10 two fifty five thirty five let's just
go into a meaty set up and that's going to be the exact opposite way.
That means that your tire is bulging out farther.
It's gonna give you a heavier track set up.
It's gonna give you more traction path.
It is going to give you just a stronger connection to the ground.
And it is what I would recommend you do if you're looking to do a track oriented set
up.
Remember you can do camber on track oriented set ups.
You wanna be probably under negative three degrees though if you look to tuck your meaty
set up underneath your stock fender.
What we do say is anything above a stage two for a meaty set up though you are going to
lose a lot of the attributes that make a wider tire better.
You're gonna have loss of traction due to the fact that you're not gonna have the same
connection points as you would on a properly set up tire.
Now if you go into the real math of it it can be an entire mess but what you do need
to know going up a size, or going up two sizes is probably all that we would recommend if
you're looking to do a meaty set up.
So this is one of those videos that is a little bit more moderately math oriented it is gonna
require you guys to watch two or three times if you're trying to do your own math but we
will put a little bit of a formula in the description below.
If you're interested in seeing what these tire set ups look like with an actual picture,
check out our gallery at fitmentindustires.com.
You can actually enter in the tire size and wheel size of what you're looking to buy.
There are cars in our gallery that have that exact setup.
So you can see what those tire stretch or meat set ups look like.
And of course if you're looking to, you can add to our gallery if you have an app to mark
your car, fitmentindustries.com/add.
If you're looking for wheels and tires and you're looking to get that stretch set up
or that meaty set up you can just get a square set up like ninety percent of the world, you
can go up to fitmentindustries.com and you can build your own package.
We have thirty thousand wheels, tires, all that sort of good stuff.
Everything from your gram lights to your volks to your ESRs to your and I mean everything
absolutely everything.
Don't forget to subscribe.
I'm Alex from Fitment Industries.
Thank you again to H3LLK1T3 for providing us this math.
It was absolutely awesome and we will see you later.
Peace.