How To Measure Your Wheels (Diameter, Width, Offset, and Backspacing)

How To Measure Your Wheels (Diameter, Width, Offset, and Backspacing)


– Hey guys, what’s going on. It’s Alex from Fitment Industries,
and today we’re going to be talking to you about, the basics of measuring your wheel. Now I know that sounds
like a very simple question to be asked, but car wheel
manufacturers do a lot of weird things, and they will
mess up your measurements if you don’t know how to
measure them correctly. So today we’re going to be
talking about the diameter, width, back spacing and of course offset, so that you know how to measure
those things appropriately when it comes down to buying
your first set of wheels. So we’re going to start off by
just measuring the diameter. Now you would assume on a
wheel like this that you would just measure from the tip of
one point to the bottom of another point. So what if you do that,
we’re going to end up getting 19.5 inches. Well that’s not the case at all, it’s actually an 18 inch wheel. And that is because you’re
not going to measure from the outer lip to the outer lip. What you need to do is, you
kind of need to guess a little bit on where the actual
hoop of the wheel starts. Which if we take a look
from the side profile, you’re actually going to see
it starts right about here. And that’s going to give
us that 18 inch number. It’s going to be the same
thing with the width. You would assume that you
would measure from the farthest back point to the farthest
front point of the wheel which we are going to get 12 inches. So right now we are at a 19 by
12 which sounds pretty cool. But it’s not. It’s an 18. And it’s actually an 18 by 11 And we measure that by going
the inside of your bead seat to the inside of the other bead seat, which is going to give us 11 inches wide. So we already got 2
measurements that are different than if we were to measure
how any normal person, or maybe first person buying
their wheels if their in the garage would measure this stuff. That’s where it gets really confusing. So the next thing that we’re
going to go into is something called offset. Now we did do a video where
we explained offset in further detail, and if that’s something
that you’re interested in learning specifically about,
we’ll actually drop a video over here for you to take a look at. But offset is the measure
between your center line and where the actual mounting
surface of your wheel is. From there you measure the
distance between your center line and where your actual
mounting hub surface sits. And that distance between
those 2 points in millimeters is your offset. So watch that over again if you need to, I know it’s a little bit
confusing, it can be a little difficult to measure, but
it’s definitely worth it so you can understand how
offset is calculated. No backspacing is something
that’s actually more commonly used by the older crowd. No offense, sorry guys. And it’s used primarily by
domestic muscle car owners, they still go off backspacing
as a very common way to measure, and it still has it’s purpose. You want to measure both if you can. So offset and backspacing are
almost the same exact thing right? Offset is going to be the
difference between the center line and your hub, and where it’s
actually mounting up to. Whereas backspacing is going
to be from your back pad to the outer lip of your wheels. And right here that gives us
6.5 inches of backspacing. So 6.5 inches of backspacing,
we’re at a plus 8 offset, on an 18 by 11 Cosmos Racing XC206R. These are things that you
are going to want to know and understand if you are looking to get extremely tight fitment. A lot of you guys out
there that watch our videos are looking for an aggressive
fitment so just basing it off of something very conservative
and then putting spacers or something like that is
just not the way to go. If you want to get it perfect
you want to get it done right. So this Alex from Fitment
Industries, the next video we’re going to talk about is
actually measuring it when we have a car on a lift. But let us know if you
have any questions as well. Drop a comment below and
of course check out our Youtube page and website
where we got thousands of wheels and tires. Wheel packages all that sort of stuff. So that is www.fitmentindustries.com That’s the sales pitch. But let us know if you
guys have any questions. I’m Alex from Fitment
Industries we’ll see you later. Peace.

Only registered users can comment.

  1. Hi, can you do a segment on color/finish differences? ie. hyper silver vs machined silver, hyper black vs black chrome, polished vs chrome, etc. I know I can google it but sometimes it's difficult to tell by photos because of different lighting.

  2. damn those wheels are beautiful. lol backspacing i can honestly say ive never had to consider that measurement

  3. Oh my god I’ve never heard of back spacing! Thanks that’s my constant problem with wheels. Offset correct with 30mm spacer but still ends up rubbing my coil overs.

  4. What’s the colour of the cosmis wheels in the backround? Same wheel as the one you are displaying but abit more bronze? Bronze chrome?

  5. Can you make a video going over your choices for rims in the 500 range? I’m trying to look stylish but not curb 2k rims at a drift event

  6. That color is amazing I wanted that color for my car, but people here are using it too much so I have to find another color. Amazing video.

  7. Hey can u help me please ,can you tell me what size of rims will fit to my car ,is a 2004 golf ,still have the factory rims they are 225/45/17 and I need OS rims because I won't use spacer or or something like that can you help please thanks

  8. Awesome video guys! I have a question, how can i anticipate the difference in the wheel size due to the lips and what not?

  9. Please make a similar measuring video, but for a car wheelwell, front as well as back, how can we get the idea of fitment from the car.

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