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Discussion Starter · #1 ·
Hey all. So I'm a total noob when it comes to wheels. I'd like to get some aftermarket wheels on my K5, but not sure what to look for, particularly in terms of offset. For example, I found some wheels online that I like, and they're +45 offset.

Can someone please explain to me, like I'm 5 years old, what this means and how it affects the appearance of the wheels on my vehicle (K5 EX)? I've been on Google and maybe I've just found not so great explanations, but it hasn't all made sense to me yet.
 

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2021 Kia K5 Gt Line AWD
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So these following websites definitely helped me and guided me in choosing which wheels I went went. Basically offset is how much further or closer the wheel sticks out. The higher the number the closer the inner rim is to the suspension struts. The lower the number the further away it pokes out. My Gt line came with 18x7.5 with +50.5 offset. I ended up going 19x8.5 with +40 offset and I don’t recommend anything lower.

This website lets you input your current wheel specs with the new wheel specs and shows you a diagram comparing the fitment.

This website shows you the tire profile side by side if you’re interested in a tire upgrade as well. Again you just input the current tire specs with the new tire specs.

This website is just a chart showing what rim widths are recommended for tire widths.
 

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So you car has the following stock wheels with the following specs
18.0 diameter
7.5 wide
50.5 MM OFFSET
67.1 CB ( center hub bore)
5 x 114.3 MM stud pattern. 5 studs on 114.3 MM bolt circle diameter. Also 5 x 4.5”.
114.3 MM is the same as 4.50”

The diameter and the width are pretty straight forward.
Offset can be positive or negative, however almost all wheels on modern cars have a positive offset.
So offset is the distance from the center of the rim to backside of hub, (spokes)
On your wheels if you drew a line down the center of the rim top to bottom the back of the hub is offset 50.5 MM (1.99”) toward the outside of the car.
So you looking at wheel that has an offset that is 45 MM (1.77”) so if you subtract 1.99- 1.77 = .21”
So since the offset on the new wheel is less the wheel will stick out toward the outside of the car an additional .21” which gives it a wider more aggressive look,

This is if you use a wheel that is the exact same width of 7.5” of your stock wheel. If you buy a wheel that is 8.0” wide, you have added an addition .50” total width. So it will be .25 wider per side.

Now add .21 less offset and .25 additional width and the wheel will stick out a total of .46 wider toward outside of car.

Now the other thing you need to know is the center bore diameter of the new wheels you at looking at.

The center bore is important as it fit the hub of the rotor and provides centering and support of the wheel on the vehicle,,so the studs do not have to provide all the support and also makes the wheel run true.

This Is the the little round hole in the center of the wheel. Yours is currently 67.1 MM CB
As a example, allot of aftermarket wheels have a 74.1 MM CB.

So in this case you would need to buy a hub centering ring that is 67.1 to 74.1 conversion
(eBay $12.00 for all 4)

Remenber this is an example ., you need to vericy the the size of the wheels you buy.
Last but not least, you will either have to have your TPMS wheel sensors transfered from your current wheel to you new ones or buy another set.

Now to answer your question directly. You can install either 19 or 18 wheels with 8.0“ width and 45 MM offset and will fit fine and look good. I am looking at upgrading mine to 19 x 8 45 MM offset

Final note make sure the new wheel have 5 x 114.3 bolt pattern

Good luck and hope this does not confuse you. Most people,do not understand all the variables when looking at wheels.
 

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Discussion Starter · #4 ·
So you car has the following stock wheels with the following specs
18.0 diameter
7.5 wide
50.5 MM OFFSET
67.1 CB ( center hub bore)
5 x 114.3 MM stud pattern. 5 studs on 114.3 MM bolt circle diameter. Also 5 x 4.5”.
114.3 MM is the same as 4.50”

The diameter and the width are pretty straight forward.
Offset can be positive or negative, however almost all wheels on modern cars have a positive offset.
So offset is the distance from the center of the rim to backside of hub, (spokes)
On your wheels if you drew a line down the center of the rim top to bottom the back of the hub is offset 50.5 MM (1.99”) toward the outside of the car.
So you looking at wheel that has an offset that is 45 MM (1.77”) so if you subtract 1.99- 1.77 = .21”
So since the offset on the new wheel is less the wheel will stick out toward the outside of the car an additional .21” which gives it a wider more aggressive look,

This is if you use a wheel that is the exact same width of 7.5” of your stock wheel. If you buy a wheel that is 8.0” wide, you have added an addition .50” total width. So it will be .25 wider per side.

Now add .21 less offset and .25 additional width and the wheel will stick out a total of .46 wider toward outside of car.

Now the other thing you need to know is the center bore diameter of the new wheels you at looking at.

The center bore is important as it fit the hub of the rotor and provides centering and support of the wheel on the vehicle,,so the studs do not have to provide all the support and also makes the wheel run true.

This Is the the little round hole in the center of the wheel. Yours is currently 67.1 MM CB
As a example, allot of aftermarket wheels have a 74.1 MM CB.

So in this case you would need to buy a hub centering ring that is 67.1 to 74.1 conversion
(eBay $12.00 for all 4)

Remenber this is an example ., you need to vericy the the size of the wheels you buy.
Last but not least, you will either have to have your TPMS wheel sensors transfered from your current wheel to you new ones or buy another set.

Now to answer your question directly. You can install either 19 or 18 wheels with 8.0“ width and 45 MM offset and will fit fine and look good. I am looking at upgrading mine to 19 x 8 45 MM offset

Final note make sure the new wheel have 5 x 114.3 bolt pattern

Good luck and hope this does not confuse you. Most people,do not understand all the variables when looking at wheels.
I'm sure it will all make more sense the more I read it. Fantastic reply, thanks!
 

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Hey all. So I'm a total noob when it comes to wheels. I'd like to get some aftermarket wheels on my K5, but not sure what to look for, particularly in terms of offset. For example, I found some wheels online that I like, and they're +45 offset.

Can someone please explain to me, like I'm 5 years old, what this means and how it affects the appearance of the wheels on my vehicle (K5 EX)? I've been on Google and maybe I've just found not so great explanations, but it hasn't all made sense to me yet.
 

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I'm sure you already ordered your wheels by now but just in case you haven't middle of August im getting my 20 inch wheels put on my k5 and could post pictures so you can see how they look
 

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I'm sure you already ordered your wheels by now but just in case you haven't middle of August im getting my 20 inch wheels put on my k5 and could post pictures so you can see how they look
What are you doing with your stock rims?
If they are the black stock rims would like to purchase.
 

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What are you doing with your stock rims?
If they are the black stock rims would like to purchase.
Keeping them for winter use but I can definitely tell you that you could find some nice aftermarket wheels for about the same priced id want for just the factory wheels
 
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