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How to Measure for Aftermarket  Wheels

How to Measure for Aftermarket Wheels

– What is going on guys,
Gels from Fitment Industries and we’re here with my car. I brought it out of storage
specifically for this video. So, here we have it. So what we are going to do today is a video that we have
attempted many, many, many times. At least, probably, about five times and we’re gonna do it
again because why not? So what we’re going to go
over today is how to go over and measure for wheels for your car. So we’ll be going over some width, we’re going to be going over some offset, we’re gonna be going over
things like backspacing, frontspacing, all that kind of stuff to see what wheels and
how it is gone about to measure for wheels for your car. So before we go ahead and get into it, don’t forget to subscribe and if you’re looking for
wheels, tires, and suspension, you know, after you get
everything figured out here, head over to
where we got it all and of course don’t
forget about the giveaway we have gone on with ESR Wheels right now. That’s right you can win a free set of Forged Multi-Piece ESR Wheels. All you got to do is pick up some merch that we had designed
specifically for this giveaway we’ve got wind breakers, we got a hoodie and we got a T-shirt. Every $5 spent on those items is an entry. So, multiple entries available. Go over to
and check it out, but let’s go ahead and
dive right into this. So, on my 2013 Scion FRS I am running some NKNT 03s with the size of 18 by nine and a half plus 40 for the offset
with a 255/35 tire setup. Some Nitto NT555 G2s it’s an absolutely perfect set up for me for what I’m looking for. I like to, what’s the word, spirited, spirit,
spiritually drive this car. Which I’m not, like, pushing into any, like, limits or anything like that, but I like to have fun with it and I daily drive it during the summer. So it’s a perfect setup for me, I wanted something that
was going to give me like a nice flush setup
with a good size tire, but that’s what I knew going into it. So we’re going to use that
kind of as a reference point to go over my FRS here. So the first thing that
you’re gonna want to do if you’re looking at
measuring for your wheels, is you’re gonna wanna find your
backspacing for your wheels. Now what your backspacing is
gonna be is the measurement from the front of your
mounting surface here. So this is where your wheel, the back pad, like the
mounting pad of your wheel is going to mount to your car. So, this surface right here. Now, this is going to be
our main reference point for pretty much all of this. It’s a flat surface, this is
where the wheel mounts to, it’s where the offset is dictated from. What we’re going to do is we’re going to take a
nice straight edge here. Rusty but trusty, all right? You’re gonna want to compress your strut or your suspension components up to where it would be
with the car on the ground. That way you don’t have to worry
about dealing with any like like geometry or trigonometry
or whatever the hell you might want to call
it, when it’s at drip. So you wanna have it where
it’s gonna be sitting when you’re driving the car so just put a jack underneath
to get it up point. So what we want to do is stick that right on your mounting surface
here, get it up far enough that it sticks up far
enough above your brake and everything like that. Now, what you’re gonna want to do is to find your backspacing, you’re gonna find the distance that is from the front of your mounting surface to where the main point of contact is with anything back here. So looking at this, it’s gonna be, of course,
our strut right here. So we’re gonna measure
from the back side of this to where we meet the strut here. Put our straight edge
back to where we meet and we are looking right
at just about 8 5/8. So, that is going to
be worst case scenario, that is like where something is meeting. So 8 and 5/8 inches from your surface to the back, you’re hitting. You don’t want that. So, we’re going to make a quick note of that on our white board here. (gentle music) So after you have your
backspacing figured out the next thing you’re gonna want to do is figure out your frontspacing. Now, once we have our
backspacing and our frontspacing we’re gonna be able to determine the width that we are going to have to go with. So, to determine the frontspacing
very similar concept. We’re gonna be using the
mounting surface of our hub and then we’re gonna measure from the inside of our fender here. So we don’t wanna
measure from the outside, ’cause if you’re measuring
from the outside. That means you still have
to worry about a tire, you got to worry about
all that other stuff. So we wanna measure from the inside to give us that extra bit of clearance. So we’re going to put that right
inside of our fender there. And then we’re gonna
take our tape measurer, put it right on the mounting hub and that looks like we
are right at 2 1/2 inches. Obviously if you want to get
very, very specific with this you can take something
like a digital caliper to get an exact measurement
if you’re really looking for something to go with
fender to lip fitment or a very flush fitment. You want to get that exact dialed in. However, for this case, we’re
just gonna run it in inches and convert it to
millimeters and run with it. So now we have our backspacing
and our frontspacing, what we’re going to wanna do is add both of these to get our width. Now, this isn’t your final answer and I’m gonna tell you why. ‘Cause when you add your
backspacing to your frontspacing we’re at a total answer of 11 1/8 inches. So, if I were to tell you, hey guess what, you got
a BRZ or you got an FRS and you can run it 11
1/2 wide in the front you’re probably going to call me nuts. And you’re exactly right
because what we’re gonna want to do here is knock a
good chunk of that off. So where no one makes an 11
1/8 inch wheel, all right? So that’d be an 11 inch wheel. So that’s what you’re gonna wanna do is knock a whole inch off of that and that would give us right
around a 10-inch wheel maximum that you’re going to be wanting to run. When we do that and knock off that 1 inch we get around 10 inches which
is a more reasonable width for a front wheel on these cars. Like I said I’m running a 9
1/2 but I could go up to a 10 if I really, really wanted to. Probably a little higher of an offset or a little less aggressive offset. Which we’ll get into
in just a second here. So, you might think, Gels you, like, completely missed, like, the diameter and everything like that. Just use your best judgment. You’re not gonna run a 20
inch wheel on this car. You’re not going to run like
a 22 inch wheel on this car. You’re more than likely
got to run like a 17 or 18. You probably already know
that going into, like, I want to run such and such
diameter wheel on my car and you probably going to say
that for the width as well. But this is just showing
if you want to do this, this is how you’re gonna do it. All right, so now that we’ve
measured our frontspacing and our backspacing, we got our width of what
we can run in the front, there is one more thing
that is very, very important when it comes to fitment on your car, that we need to determine
which is your offset. Now, you’re coming into this
you’re really green at this, you’re really fresh at
this and you’re like yo, what exactly is offset? So, here is your wheel
alright, here is the inside of your car, here’s your
strut, here’s your hub, all that kind of good stuff. Here is the outside of your
car, here’s your fender. Is that a good enough drawing? I’m not an artist, all right? Let’s say this is a 10-inch wheel. What offset determines is
that if we had a 10-inch wheel with a zero offset, that the mounting pad of that wheel would be right in the
middle of that wheel. So you have five inches of frontspacing, five inches of backspacing on your wheel. Now that’s different from the backspacing and frontspacing on your
car, this is from the wheel. So it’s five inches from the
mounting surface to the back and five inches from the mounting surface to the front of the wheel. So when we start to get into offset more commonly you’re going
to probably see offsets like plus 22 for example plus 35, plus 38, plus 40, all those typical offsets. What that means is the offset
distance in millimeters from the center point of this wheel to where that mounting
surface actually might be. So if you have a positive
offset that means that this mounting surface is going to move towards the outside of the wheel or the outside of the car, meaning that the wheel
itself is going to sink into the car a little more. When you get a negative
offset or a lower offset you’re pushing that mounting
surface back towards the inside of the car pushing the wheel out. So you’re still maintaining, let’s say a 10-inch wheel in the width, but when you’re moving
this mounting surface you’re getting a more aggressive
or less aggressive fitment. So this is definitely something that we need to determine here. ‘Cause obviously you’re not
going to run a zero offset on a 10-inch wide wheel on this car unless you’re going absolutely crazy over fenders, camber, a
whole bunch of good stuff. So to determine what
offset you’re going to need let’s go ahead and change this to what I’m running right now, which is a 9 1/2 inch wheel. ‘Cause that’s what I know, that’s what I feel comfortable running. After knocking that
inch off our total width and everything like that we know that we have enough
backspacing of 8 5/8 inches before we run into anything, but of course we have to
take in tire consideration and all that kind of stuff. So what we really, really
wanna find out, right? Is where we want this part of the wheel to meet up with the car. This is going to change depending on what kind of fitment you want to do. Do you want a fender to lip fitment, do you want more of a flush fitment or do you want something like tucked if you’re goin’ on air
or something like that. This end point is where you want to know where that’s going to land and that is going to
determine your offset. So, to determine what offset
we are going to go with, we are going to need to figure
out what the frontspacing is to find the backspacing not of the car, but of the wheel. And once you have your
backspacing of the wheel and your width you can
then determine your offset. Now to do that. All right, we know that we have a 9.5-inch wheel so 9 1/2 inch wide wheel is
what I have decided to go with. Now, I grab the 2 1/2
inches for the frontspacing from what we measured. So when we took our straight edge, measured from the hub
mounting to the frontspacing where we wanted the wheel to
end up we got 2 1/2 inches, so if we take the 9 1/2
total width minus 2 1/2, quick math, right? You get a lovely number of seven inches. Now, that’s saying that
we are gonna have roughly about a seven inch backspacing
from this mounting point of the wheel hub to the back of the wheel. And I’m gonna teach you a
little secret here, all right? Fitment Industries has
a lot of awesome tools and if you go to our website we have this awesome calculator right here so when you find these numbers, you can go head to the
calculator plug in that I have a 9 1/2 inch wide wheel, plug in the backspacing of
seven inches and boom bop bang. Gives us an offset of plus 44. Now, remember where we measured that from, we measured it from the
inside of the fender liner to give us that little bit of room, plus 44 or plus 45 would be
a very conservative set up with a 9 1/2 wide wheel on this car. I wanted to get more of a flush set up so I went with a plus 40 cause I knew I was gonna be running a
little more of a thicker tire. Now a lot of people run a plus 35 with a 9 1/2 on these cars. So this gets us right into that ball park. Now, like I said you can get
very, very technical with this. You can break out the digital caliper, you can break out all the different steps to find exactly what fitment. If your looking for that
fender to lip fitment, you can do that using
this exact same method. You just need to know where
this part of the wheel is going to end up on this car. Find it relative to the mounting surface, get that frontspacing, subtract it by the total width of the wheel that you want to go with or that you can go with, find your backspacing of the wheel, plug it into our calculator. Now, if you end up getting
a weird number like I did. I got like a plus 44.43
whatever it might be you’re gonna have to obviously
round to the nearest offset. So, I could have gone with a plus 40, plus 38 for my instance would have gave me just a little more
flush, probably perfect. If you don’t want to
go through all of this, if you don’t wanna get the car in the air, you don’t wanna do the math, you don’t wanna find the frontspacing, you don’t wanna find the backspacing, you don’t want to find
the offset, all that, you just wanna see real life
examples and copy/paste, head on over to where there are over 20,000 vehicles that list their exact
width, their exact diameter, their offset, if they
have any rubbing issues, if they had to do fender rolling, if they had to do fender liners, what tire size they’re running and of course what
suspension they’re running, it’s an absolutely fantastic tool and it saves you all
the time of doing this. But if you want to do it, this
is how you go about doing it. So thank you guys so much for watching, hopefully this helped you in your journey to find the fitment
that you’re looking for and of course if you need wheels, tires or suspension hit up We’ll see you later, peace.

81 comments on “How to Measure for Aftermarket Wheels

  1. 1 Like = 1 pothole fixed in your city.

    If you scroll past, the next pothole you hit will blow out your tire and strut.

  2. See, im the idiot who buys the wheels i want then modifys the whole car to make them fit 🤦🏼‍♀️ which ends up costing 5x as much

  3. Or you can just go to Fitment (it literally helps you find everything easily tbh) love the content guys and tell Alex where the tamales are @ 😂 lol

  4. Feel like this video was directed at me lol. Shoutout Christian and Beck for being SUPER patient with me. I'll be ordering my set up real soon. Lmfao.

  5. So if I was to have this similar setup but on enkei Rpf-1 wheels, will it clear a big brake kit? I drive the TRD gt-86 and I want something light.

  6. Damn!! I'm not very proficient with numbers but this video was very comprehensive and informative. S/O to everyone at FI..🙌🏾

  7. I feel like y'all uploaded this specifically for me because I keep checking the website trying to figure out what wheel size I will need

  8. When you started drawing on the board i got lost, like on a physics class lol. But you did explained it well, can't get any simpler than that!

  9. Man!!! you have no clue how much this actually helps!! Thank you guys so much. keep the awesome vids coming!!👊👊👊

  10. Did you find this video helpful ? Let us know in the comment section below. Also, be sure to cop some gear so you can get entered for a chance to win a set of ESR wheels:

  11. this video was very helpful, also showed me the fitment i want is called flush, now make one on how to make your wallet not deflate

  12. No need to measure bro when you can go on the fitment Industries gallery and see what setups other people are running or if that doesn't work I can call you guys and bug you! 🤣

  13. Videos saved; Will be watching this video a few times to make sure I fully understand; wouldn’t want to pay any restocking fees 😅

  14. if i heard correctly, are yall using Andre 3000's aquemini beat in the background? If yall are that made stuff seem so chill in the video lol

  15. Great video! 👍
    Give it time though… I guar-an-tee there will be owners who run 20"s on BRZ/FRS/86s 🙄… and then there will be owners who run 14"s 😒

  16. Im looking into aftermarket, and im going on to get the measurments of the standard wheels just bigger sizes so 17 up to 18 same dimentions

  17. But I'm going to tell you what I LOVE about fitment industries, How fast they ship is NO JOKE, and they update you in the process. Outcasts garage needs to take notes from fitment industries.

  18. Ok you can draw something on a whiteboard, tell me about it, etc. But if you're gonna tell me what backspacing is, you're gonna have to show it to me on the dang car because I have trouble visualizing what the heck it is. I just know what offsets put the wheel where in the fender without rubbing based on what other people are running.

  19. I wish I had this video to look at when getting wheels for my car as mine is pretty rare. Fortunately my trial and error ended with 0 errors.

  20. you can get your offset a little oversized and then get a machine shop to lap it to the exact offset you need. if you are SERIOUS about that hella flush life. i just throw wheels on n buy flares n widebody if i feel like it. lmao i can never let the fenders on my car restrain my tire width. ill just buy another wider fender, i want grip and stability its not even about looks.

  21. I have been trying to figure out a way to calculate the perfect offset for my car.
    Thank you Gels and Fitment Industries for the valuable information.

  22. So I'm a little lost around offset, so if your offset was 44, how much of a breathing room do you have to go lower or higher?

  23. Can’t lie I was always scared to get wheels with all the math involved started following you guys now it’s no big deal plus the gallery really is a lifesaver to know what you’ll see on your car

  24. These are well explained but i was wondering if someone already came up with an autocad 2d visual of the wheel plus suspension and well where you can play around with the numbers and get the look at the same time

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