[m2not1LE]

Originally Posted by Ronin76

Great….another article.

Yes, reading is the primary means of learning in life, especially so in the more complex fields such as engineering.

But whatever you want on your cars for wheels and tires if "the look" is all you want. But if you want your car to be dynamically better, read and learn from the information I've provided.

[Ronin76]

Originally Posted by m2not1LE

How will the aftermarket wheels offset be "better" than those of the stock wheels when BMW suspension engineers specifically designed suspension geometry around the stock offset (and vice versa)?

Suggested reading here and you might suspect, it's all about engineering (kinematics in particular). Changing wheel offset changes scrub radius and kingpin offset, which in turn adversely impacts handling, braking and acceleration.

Yes those changes will be "very small" in most cases, but they're all for the worse.

Larger diameters wheels are also typically a real issue as the adversely impact wheel/tire rotational interim - even in cases where new wheel/tire weight is identical to OEM.

When changing wheels, offset should be retained and the combined wheels/tires should be lighter in weight if wheel diameter is increased.

Many don't care about these things and just want "the look." Their money and their choice, though more times than not significant compromises in overall vehicle dynamics are the result.

I'm a bit clueless with this wheel fitment stuff at the moment, as you can tell.

Blah blah blah blah

[m2not1LE]

Originally Posted by Ronin76

Blah blah blah blah

The last sentence I included in the last post to which you replied is your own from an earlier post in this thread. (See below.)

If you're "a bit clueless" about this topic, why mock the person who's trying to help you understand by posting related technical links?

Fact: These topics are very difficult in scope and require equally difficult technical content in order to truly understand.

Originally Posted by MineralGreyMetallic

The wheel manufacturer I'm working with says there should be no rubbing with the 20" on the G87.

I'm wondering if the different offset, which from what I understand is fairly aggressive on these wheels, avoids the issue.

I'm a bit clueless with this wheel fitment stuff at the moment, as you can tell.

[Tag]

Originally Posted by MineralGreyMetallic

I'm open to give "experts with deep knowledge" their fair space, but that guy just kept waving his hands after I provided a bunch of data for comparison.

Unfortunate.

Thanks to the others that put my mind at ease. That guy had me convinced for a moment that my suspension was going to catastrophically fail on my new wheels.

Here's a post I made a while back; you may find it useful. You should also be using a wheel/tire calculator, it's the best tool for this. If you're new to wheel/tire sizing then you can call up some wheel shops and ask all your questions, they have all the numbers and can tell you what will and won't work.

[Mr. Hankey]

Originally Posted by m2not1LE

How will the aftermarket wheels offset be "better" than those of the stock wheels when BMW suspension engineers specifically designed suspension geometry around the stock offset (and vice versa)?

Why then are the cars faster on track with lower offset wheels that are out of BMW stock spec?

This has been empirically measured and is known. I just don't get it

[MineralGreyMetallic]

btw, I'm going with Edelweiss wheels.

They seem to have very specific verified applications for their wheels. The G87 is on their list.

This is their mission statement, more or less:

"Most customers are simply looking for lightweight, concave wheels at a reasonable price that are safe, look good and just fit their car without having to worry about clearing issues, adapters, or anything else."

I have also seen other G87 owners on these wheels.

So I think I'm safe

https://en.edelweiss.one/lt3

Still, it is on my todo list to learn to verify all this stuff myself, if I can.

[Ronin76]

Originally Posted by MineralGreyMetallic

btw, I'm going with Edelweiss wheels.

They seem to have very specific verified applications for their wheels. The G87 is on their list.

This is their mission statement, more or less:

"Most customers are simply looking for lightweight, concave wheels at a reasonable price that are safe, look good and just fit their car without having to worry about clearing issues, adapters, or anything else."

I have also seen other G87 owners on these wheels.

So I think I'm safe

https://en.edelweiss.one/lt3

I think you are too and you picked a sweet set my man. What color did you end up going with? I love their champagne.

[MineralGreyMetallic]

Originally Posted by Ronin76

I think you are too and you picked a sweet set my man. What color did you end up going with? I love their champagne.

Champagne!

[Ronin76]

Originally Posted by MineralGreyMetallic

Champagne!

Damn…it’s going to look so nice.

[Mr. Hankey]

Originally Posted by MineralGreyMetallic

btw, I'm going with Edelweiss wheels.

So I think I'm safe

That color is epic! You are safe on those. If you look at others like Apex, VT forged, Richland Forged and they all have widths and offsets that fit the G87. Guys race on these aftermarket rims with spacers and are fine (Apex comes to mind here). They will be quite a bit lighter than the stock wheel/tire setup and that is something that will liven the car up.

[AZG87]

Originally Posted by Mr. Hankey

That color is epic! You are safe on those. If you look at others like Apex, VT forged, Richland Forged and they all have widths and offsets that fit the G87. Guys race on these aftermarket rims with spacers and are fine (Apex comes to mind here). They will be quite a bit lighter than the stock wheel/tire setup and that is something that will liven the car up.

Ideally though you find a design and weight you like AND an offset that doesn't require spacers.

[Mr. Hankey]

Originally Posted by AZG87

Ideally though you find a design and weight you like AND an offset that doesn't require spacers.

Ahh, good point...do the Edelweiss need spacers? Page ist halb Deutsch und ich spreche/verstande nicht so gut.

...on the other end of things Richland Forged offsets for example seem a bit on the aggressive side which will leave some space near the struts but more poke than I like, although haven't seen any pics of those on a lowered G87.

[Ronin76]

Originally Posted by Mr. Hankey

Ahh, good point...do the Edelweiss need spacers? Page ist halb Deutsch und ich spreche/verstande nicht so gut.

...on the other end of things Richland Forged offsets for example seem a bit on the aggressive side which will leave some space near the struts but more poke than I like, although haven't seen any pics of those on a lowered G87.

It depends on how aggressive you want it. Using the stock sizes of 19s in the front and 20s in the rear (and also using stock tires) their sizes are....

19” x 10.5 ET 14mm
20” x 11 ET 12mm

I would like to go...

19" x 10 ET 11mm
20" x 11 ET 8mm

Comparing the two, the front of the Edelweiss will stick out 3mm more per the "Will They Fit" website. The rears of the Edelweiss will be recessed in 4mm.

This is also assuming I entered the info correctly on the website of course .

[MineralGreyMetallic]

Originally Posted by Mr. Hankey

Ahh, good point...do the Edelweiss need spacers? Page ist halb Deutsch und ich spreche/verstande nicht so gut.

...on the other end of things Richland Forged offsets for example seem a bit on the aggressive side which will leave some space near the struts but more poke than I like, although haven't seen any pics of those on a lowered G87.

Edelweiss' mission statement is that they wanted to create wheels with fitment that doesn't rub and doesn't require spacers.

For the sizes I'm going with

9.5 kg | 10.5x20 ET14 for 285/30 R20
10.3 kg | 11x21 ET12 for 305/25 R21

I believe the front will stick out 15mm from stock
The rear will stick out 16mm

[Ronin76]

Originally Posted by MineralGreyMetallic

Edelweiss' mission statement is that they wanted to create wheels with fitment that doesn't rub and doesn't require spacers.

For the sizes I'm going with

9.5 kg | 10.5x20 ET14 for 285/30 R20
10.3 kg | 11x21 ET12 for 305/25 R21

I believe the front will stick out 15mm from stock
The rear will stick out 16mm

Will you be lowered at all. Ride height will also play a role in how much the wheels poke out or are recessed in which is why I am dying to see someone at port install MP HAS height with the specs I am shooting for. Based on that I will then decide if I need to make some tweaks. I might get some spacers and slap them on with the OEM wheels before ordering to get a better ide of what would look best.

[MineralGreyMetallic]

Originally Posted by Ronin76

Will you be lowered at all. Ride height will also play a role in how much the wheels poke out or are recessed in which is why I am dying to see someone at port install MP HAS height with the specs I am shooting for. Based on that I will then decide if I need to make some tweaks. I might get some spacers and slap them on with the OEM wheels before ordering to get a better ide of what would look best.

On MP HAS, but I will be taking it to the shop to have it lowered more when I install the new wheels.

Another guy on this forum with the same setup I'm ordering replaced his MP HAS because it didn't go low enough for him.

We'll see how I like the drop on MP HAS...

[Ronin76]

Originally Posted by MineralGreyMetallic

On MP HAS, but I will be taking it to the shop to have it lowered more when I install the new wheels.

Another guy on this forum with the same setup I'm ordering replaced his MP HAS because it didn't go low enough for him.

We'll see how I like the drop on MP HAS...

Post pics please!!

[MineralGreyMetallic]

Originally Posted by Ronin76

Post pics please!!

There will be plenty!

[Tag]

Originally Posted by MineralGreyMetallic

On MP HAS, but I will be taking it to the shop to have it lowered more when I install the new wheels.

Another guy on this forum with the same setup I'm ordering replaced his MP HAS because it didn't go low enough for him.

We'll see how I like the drop on MP HAS...

The MPHAS has a lowering range of 5-20mm. BMW sets it up at 10mm from factory so you can drop it another 0.4". Just know that this also means you decrease the compression range before you hit the bump stops. I'm not saying don't do it, just play it by ear and see if it works for you. Unsure how many miles you have on your car, but the springs will also settle a bit over time.

[Mr. Hankey]

[QUOTE=Tag;31072309]The MPHAS has a lowering range of 5-20mm. BMW sets it up at 10mm from factory so you can drop it another 0.4". Just know that this also means you decrease the compression range before you hit the bump stops. I'm not saying don't do it, just play it by ear and see if it works for you. Unsure how many miles you have on your car, but the springs will also settle a bit over time.

The settling is real. I will drive it for 3-4 months before touching the height.

[MineralGreyMetallic]

Originally Posted by Tag

The MPHAS has a lowering range of 5-20mm. BMW sets it up at 10mm from factory so you can drop it another 0.4". Just know that this also means you decrease the compression range before you hit the bump stops. I'm not saying don't do it, just play it by ear and see if it works for you. Unsure how many miles you have on your car, but the springs will also settle a bit over time.

1k miles, so I imagine they will still settle more. I've had the car since 1/15/24.

Appreciate the advice. I'm assuming it will be quite clear if I've gone too low. At which point I'd probably have to go full coilover?

[Tag]

Originally Posted by MineralGreyMetallic

1k miles, so I imagine they will still settle more. I've had the car since 1/15/24.

Appreciate the advice. I'm assuming it will be quite clear if I've gone too low. At which point I'd probably have to go full coilover?

There are other HAS kits that go lower than the MPHAS, KW for instance. If you go with a coilovers you'll lose the adaptive dampers.