- What's going on guys?
I am Fuller with Custom Offsets TV.
Welcome to the channel.
If you are new, if you found this video
it's likely because you're searching to buy
new wheels and tires so I wanted to explain to you
something about offsetting, exactly what is offset,
what is backspacing, how do they correlate
and I guess we're gonna try to teach you
just about everything you need to know about offsets.
So we actually got this question in our inbox
which is part of our From The Inbox series
so believe it or not probably only like five years ago
offset was not a really common industry term.
Obviously it existed because it's always been
a part of wheels but not everybody knew about offset
or knew how to find their offset or what offset
they needed for their vehicle until more recently.
So we still do get a decent amount of questions
on what is offset so that's what
we're here to explain today.
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So before we dive completely into what is offset
you kinda need to understand how to measure a wheel.
So the easiest one is the overall diameter.
So if you're looking at a wheel straight on
the measure from here to here across is your diameter.
So usually this is gonna be the 20 or 18 or 17
or whatever it is depending on your wheel size
that you see first and then the second is your width.
So if you take a wheel and you turn it sideways
it actually looks something kinda like this.
My drawing is pretty crude but bear with me.
So these are the face and the back of the wheel
and this is going to be the width
which is the measurement between here and here
and that's going to be like in the truck world
a really common size is a 20 by 12.
So that's how you get your 20 by 12 wheel size.
This is where offset comes into play
'cause the next number you see is usually
gonna be something like a negative 44
and that is your offset.
So what is offset?
If you look at this, this is the backpad of a wheel,
this is a fuel wheel, this is a 12 wide negative 44 offset.
So what the negative 44 is, is negative 44 is millimeters
and it's basically how far offset the center pad is
from where the center of the wheel is.
So if we take a look at the whiteboard
the center of the wheel is straight down the middle.
If you were to offset the pad negative 44 degrees
the pad is further back.
So like this is the truck side
and this would outside of your fender.
By pushing this pad further back
you're pushing the wheel further out.
So that's how you get that stance look
if you're trying to push your wheels outside of your fender.
Now going back to this.
Offset and backspacing kind of play hand in hand
where if you take a straight edge across
your wheel like such and you measure straight in
this one comes out to about four point seven five,
four and three quarters inches.
And that actually you can put that in the calculators
on our website if you want and it'll show you
that it's about negative 44 offset.
So you won't be able to get like a very specific
number out of, you know if you measure it
and you say it's four and five eighths
and you type that in and the decimal's all wonky
so it gives you like negative 48,
it's probably gonna be a negative 44 offset
'cause manufacturers basically stick to that.
Like in your 20 by nine it's common to have 20 by nine zero.
There's postive sizes like plus 18
and then it goes all the way down to negative sizes
as negative 12, or negative 18 at the most
is probably the pretty common ones in a 9 wide.
A 10 wide is typically negative 24
and then your 12 wide is typically a negative 44,
some companies out there are doing negative 51.
A 14 wide is typically negative 76
so you can see as you get wider and wider wheels
they also have I guess less offset,
it's more negative offset.
Let me draw a wheel real quick from the side.
So this is a side view of a wheel.
If it looks kind of wonky to you
you can see the examples that we have down here
that kind of shows you what the cutout is.
So basically there's your base here,
and your the backside of the rim of the wheel here
and then this is the center structure
so basically the center of your wheel's gonna be in here,
and then if there's any spokes that come out
they'll be going this way or straight out
to the barrel, however the wheel is designed,
but that kind of gives you your side profile
of what a wheel looks like.
Translated up to the board.
So understanding negative and postive offset.
If you have a car you're gonna typically run into
postive offset situations, trucks with aftermarket wheels
you're typically running into negative offset situations
if you're going for that stance look,
your stock wheels and tires are usually
almost always positive.
So if I divide this right down the center
this like I said would be a zero offset
if the pad lines up perfectly here it's a zero offset.
So if I draw this where, like if this was a
concave width wheel and you've got
spokes coming in this way and now if it's postive offset
the pad or the surface where the wheel mounts
to your vehicle is on this side of it
that's going to be your plus 12 offset
where it's 12 millimeters away from the center
towards the outside of the wheel.
On the opposite spectrum if you have a lipped wheel
and your spokes are further back here
and they come down say this way
and you have all this lip out front
now your spokes dive back and they are behind
the center line and they might add
some additional padding to the back of the pad,
again that's where the wheel mounts
to your hub of your vehicle.
So now you can see that it's so much further back
and this is where you would see probably
if this was a 12 wide, this distance is 44 millimeters
so it's a negative 44 offset
because that pad is pushed further in
towards the vehicle which in turn
pushes the wheel further out.
So with these two wheels down here I grabbed two examples,
it's the same wheel but in two different sizes.
So you'll see this one it's a 10 wide
and the opposite wheel here,
you measure it across is a 12 wide.
So you measure actually between the rim of the wheel
to get the correct size, helpful hint,
but what I wanted to show you then was
what happens to the lip of the wheel
when you change offsets.
So like I said this is a 12 wide
and you can take a look at the front of it here
and if we go in and measure this lip
with an actually tape measure,
and not a hundred dollar bill,
right to the front of the spokes
you can see we get about a five inch lip on the 12 wide.
Now if you go over to the 10 wide
keep in mind this is a negative 24
and this is a negative 44
you'll see it drastically reduces the size of the lip
to about two and a half inches.
So if you remember, this one was at five
and this was two and a half,
but there's only a two inch difference in the actual width.
The rest of the difference comes from
the difference in offset, this being negative 24
and this being negative 44, that's where the difference is
where you get that lip being smaller
on the 10 wide versus the 12 wide.
So it's the width and the offset that both impact that.
On the backside it's just as easily noticeable there
on both of these wheels.
So if you were to measure the pad
which I need my stick for.
So if you come in here and then measure this
to measure the backspacing, put my straightedge across,
measure it in, and it's about four and five eighths,
to fourth and three quarters ish.
You come over here and you go to measure this one,
now this is 12 wide, the last one was 10 wide
and I stick my hand in front of the camera
and the measure is basically the same.
So you might be thinking well that means
they have the same offset but that's not true
because they're different widths.
So the negative 24 might measure out
to be the same backspacing but it won't be the same offset.
And that's one of those things where
you can punch it in the calculator on our website
because you have the factor in the width and the offset
to calculate the proper backspacing.
So offset is really important to understand
when you're looking for fitment for your vehicle.
I think offset and width are gonna be your biggest factors
and then as well as tire size that's gonna be
other really important one
that you want to pay attention to.
So we've actually developed a gallery
that's got over 40,000 vehicles in it
that you can go out and then plug in
your specific year make model of truck
and if you've got a certain size lift kit on there
you can add that in there,
if you've got stock suspension you can just plug that in
and it'll show you what everybody else
has been running along with detailed pictures
and all the fitments specs you need to know,
you know whether there's any trimming done
or any rubbing that occurs that's all in there
and it gives you all of the specs on wheels
and tires as well, so it'll give you
exactly the 20 by 12 with the negative 44,
and everything you need to know,
33, 12 and a half, it'll give you very specific sizes
so that you can see exactly what you need to run.
So if you've been shopping for wheels,
and you didn't understand offset,
hopefully this is really simplified version of it
so you can kind of better understand what offset is
and how it impacts your fitment.
If you have any questions feel free to drop a comment below,
otherwise come out to the website, check it out,
we've got tons of different calculators on there
and then the gallery like I mentioned,
you can purchase wheels and tires right through us,
they come shipped, modded and balanced right to your door,
it's free shipping lower 48 states, customoffsets.com.
Make sure you like us on Facebook, subscribe on YouTube.
Youtube.com/customoffsetstv.
Do the motion track thing.
Peace.
(dramatic music)