[tough_enough]

I have f30 330i xdrive and found some wheels AEZ Antigua for sale with dimensions R18 8.5j et20.

The question is will it fit well? I mean if this wheels will scratch fenders & what offset over the fender will be? Any info?

I'm looking a good "flush" fitment so wonder if this rims will look clean

[drapzzy]

Originally Posted by tough_enough

I have f30 330i xdrive and found some wheels AEZ Antigua for sale with dimensions R18 8.5j et20.

The question is will it fit well? I mean if this wheels will scratch fenders & what offset over the fender will be? Any info?

I'm looking a good "flush" fitment so wonder if this rims will look clean

You won't get flush Fitment unless you lower the car, from my knowledge you will now rub with that size

[Onizukachan]

That’s 5 series / m car fitment

[J555]

An aggressive fitment indeed. It actually can work, depends on the tire size and real dimensions. If you have the wheels and tires, do the test fitment. If not, I would skip it...

[johnung]

Originally Posted by tough_enough

I have f30 330i xdrive and found some wheels AEZ Antigua for sale with dimensions R18 8.5j et20.

The question is will it fit well? I mean if this wheels will scratch fenders & what offset over the fender will be? Any info?

I'm looking a good "flush" fitment so wonder if this rims will look clean

If you stock wheels are 18x8.0ET34, then the 8.5" wide ET20 wheels that you are proposing are a big difference. I'm assuming a square setup where the same size wheel and tire will be used at all four corners.

I like to think of changes in relation to stock because my car itself is a visual that I can use to picture the final result.

An extra 0.5" width on the wheel adds 0.25" more going into the wheel well and another 0.25" coming out of the wheel well. 0.25"=6.4mm. So wherever your stock wheel lip is now, picture it coming out by another 1/4 inch which isn't much.

Note: If we were talking about a tire model and size change from stock, then any changes in tire width or tire tread width would have to be taken into account. Like wheel width changes, tire width/tread width changes are applied half going in and half coming out of the wheel well. It's important to use the exact measured tire widths and tread widths found on the TireRack website under the Specs tab for each tire.

You don't mention specific changes to tire size and model, so for this exercise/example calculation, we will just pretend that there is no change for the tires.

The offset difference of 14mm is a much bigger factor. Unlike wheel and tire width changes which are cut in half, the entire offset change is applied in direction or another. If an offset increases then it is pushing the wheel deeper into the wheel well. That isn't always a bad thing because it can be fine tuned/brought out of the wheel well by adding a spacer between the hub and the wheel (and buying longer wheel bolts)

But in this example, if the stock offset is ET34 and the proposed wheel offset is ET20, then that will pull the wheel rim out of the wheel well by 14mm more than it is stock. 14mm=0.55"

So 0.25" + 0.55" = 0.8"
or 6.4mm + 14mm = 20.4mm

In a real world example, you would probably be changing to tires that are maybe 20mm wider, (say 225's to 245's) so they would poke out of the wheel well another 10mm (0.4") more than the wheel width difference + offset difference.

So for this example it's easy to take a ruler out to your car with your stock wheels and tires (remember that we assumed that they are 28x8.0ET34). Put the ruler edge against the top of the stock wheel rim. The new wheels will stick out of the wheel well by another 0.8" (20mm) and the tires will stick out another 0.4" (10mm) from there.

Like I said, if it is coming out of the wheel well more than you like, then there's nothing that you can do to change that, because adding a spacer would only push it out of the wheel well more.

Tip: Do not go by other people's descriptions of setups, like whether it is "flush" or whatever. This judgement is highly subjective. What you like and what someone else likes may be very different. Remember that fender lips and fender lines are curved, viewing angles differ, and the eye is actually looking at tread width, tire width and wheel lip simultaneously.

This video (link below) is pretty good with the camera angles at showing the differences in adding wheel spacers to the front and rear of an F30 with stock 18x8.0ET34 wheels with 225/45-18 tires.

So as you are watching the video, understand that going to a 1/2" wider wheel with 14mm less offset is like adding a 20mm spacer to the stock wheel. That's how far out it will move the edge of the wheel rim from the wheel well.

Hope this helps!

[visionaut]

https://www.willtheyfit.com/index.ph...8.5&offset2=20

A “before-after” wheel/tire fitment calculator is very handy when considering wheel and/or tire changes… (modify the values to suit)

[alohasurftoad]

18x8.5 ET20, offset is too low and has too much poke. for 8.5" look for offset between ET32-35. if you are not lowered i recommend tire size of 235/45/18. if you are lowered, 255/40/18 or 245/40/18.

[johnung]

Originally Posted by alohasurftoad

18x8.5 ET20, offset is too low and has too much poke. for 8.5" look for offset between ET32-35. if you are not lowered i recommend tire size of 235/45/18. if you are lowered, 255/40/18 or 245/40/18.

I have also read you caution against automatically assuming that a wider wheel is the best choice.

At a recent car show I saw a car that had 255's on 9.5" wide wheels. It looked terrible! The tire was so stretched that the wheel rim stuck out of the wheel well more than the tire. Had he scraped a curb, it would have damaged his entire wheel rim and the tire may have escaped without a scratch.