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The Basics of Wheel Fitment

Fitment Industries Author | | January 18th, 2018 |

  • - What's goin' on, guys? It's Alex from Fitment Industries, and today, we're going to be talking to you about fitments. So, one thing you guys may have noticed is that all of our videos, all the things we've been trying to show you on Facebook, or on our website, is trying to get you to get the perfect to get the perfect Fitment setup on your vehicle. Well, sometimes, people just don't understand what fitment is. We were all there once. Not all of us are experts in the wheel fitment game. So, when we get into fitment, the first thing that we just want to talk about is the overall basics of a wheel. So, when we talk about bolt pattern, or hub bore, the diameter, or the width of the wheel, all of these things end up making what fitment ultimately is on your car. And it's also rims and tires.

    We're simply going to be talking about (beep) today, but we will be talking a little be about tires as well as we go through this. So, if you're looking to get started into getting the perfect fitment on your car, you're gonna want to learn first just about your setup on your car. So, what is the bolt pattern that you have? You're gonna want to make sure that you get the right bolt pattern just to start off. So, once you figure out what your bolt pattern is, you're also gonna want to know, or at least keep in mind of what your hub bore is. So, your hub bore is the size of your hub. Your hub would be this center piece, the actual inside, not the plastic cap. You'd be able to measure that using a tool yourself. Usually, that is measured in millimeters. So, a lot of after market wheels are gonna have a larger hub bore than what your factory vehicle's gonna have. And they do that on purpose. They wanna make sure that those wheels will fit your car. If your after market wheel has a smaller hub bore than what your vehicle allows, you are going to experience that some things simply will not fit. So make sure you're keeping an eye on that when you're buying wheels and tires. Another thing that they can come with, with hub bore, you can get adapters. So, something that if your aftermarket wheel is going to have a larger hub bore than what the vehicle has, you can get adapters to help make sure those fit and snug. Hub bore helps, especially when you get the right sizing, to minimize any sort of vibration and just overall drive quality of your after market wheels on your car. The most important thing you guys probably think is diameter. And, we've gotten really accustomed to getting huge wheels on these cars.

    But something to remember is that if you're looking to modify an older car, you don't just want to get a huge, wide wheel, a tall diameter wheel, just because you can. You're gonna want to make sure you keep in mind just how the overall wheel is going to look, and that's where diameter really starts to play a role. Not all wheels are the 17 inch sizing anymore. A lot of them are coming standard in 18, or even 19 inch sizing. But, you're gonna want to make sure you do something that's called sizing up. You can actually take a look on your stock wheels and tires what the actual diameter and width is, and then looking at what your tire aspect ratio is, and overall diameter, you can go up a size in a wheel from maybe a 17 to a 18, if you downsize the actual size of your tire to maybe a 235/45, to a 235/35. And that will allow you to actually maintain the same overall diameter of your wheel setup that you have stocked to after market wheels and tires. If you continue to up-size, which you definitely can, You're ultimately gonna reach a max, then it's just gonna look like you have rubber bands on your rims, and that's just not gonna look good at all. If you're ending up and getting diameter and you're not caring about width, that's bad. Something to make sure that you're keeping in mind is your overall wheel width. So, if you're taking a look at upgrading to maybe a 9 inch, or 9 and 1/2, that you have the clearance for it.

    So, something that you can do, is you can actually measure the space from your tire on your stock vehicle to the nearest potentially protruding object, like maybe you have your perches, or your suspension components, or something like that, and see how much space you have to play with. On our website specifically, we take care of all of that for you, so you can make sure that you're not going to have any issues with clearance. But, if you want to double check and make sure you're doing it right, you can actually go there, you can measure the distance, and then multiply that by two because you have to remember that the wheel will be going wider in both directions. So, if you have, let's say, an inch of clearance space, you would actually be able to go two inches wider if you really want to play it aggressively. But you're gonna have to remember to take into consideration like 1/8 to 1/4 of variance, you have to think about tires, if the tires are gonna stretch, or anything like that. Another thing that's really going to help you is understanding what offset is.

    Offset is going to be what really makes one of the biggest differences between how a wheel looks, and how a wheel is going to perform actually on your car. There's a couple different things that you can really consider with offset. You have positive offset, negative offset, and zero offset. Starting off, positive offset is gonna be when the face of the wheel extends to the outboard side of the rim. It's gonna tuck the wheel underneath further into the wheel well, and you can actually experience some clearance issues. Negative offset is when the center piece here is going to be sitting farther back in the actual wheel, and it's going to protrude out towards the fenders. So when you get closer to zero, you're going to experience usually more lip, you're going to experience potentially clearance issues with your fenders, or rolling and things like that, but most people try to go down an offset to give it a more aggressive look. Zero offset is just gonna be where you're gonna want to sit if you're looking for a race, after market purpose. And that's just gonna be directly with your center line, which is pretty much just perfect bliss. But something to keep note, is that if you go too far into negative offset, you are going to experience just as many issues as you would as if you had positive offset.

    It's always a range with how you're going to set up the fitment of your vehicle, and all this stuff makes the difference when you apply your rim and tire into your wheel well, making sure that it fits properly. Fitment is all of those things. It's taking into consideration everything that makes a wheel a wheel. And making sure that it lines up with what you want on the vehicle, and what the vehicle will actually allow. Bidding that fitment perfect is the difference between having a mediocre set up and having an amazing set up. Because we truly believe that if you have the right set up on your car, you will just fall in love with your car all over again.

    So that is what fitment is. It's all of those things. We hope you guys enjoyed it. If you have questions on your fitment, let us know, shoot us an email. It's Alex Fitment Inc. We'll see you later. Peace!