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      03-04-2020, 10:11 AM   #45
Jerich0
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Quote:
Originally Posted by CanAutM3 View Post
I wouldn’t say “anyone”. It is probably not noticeable to a majority of drivers, but some more sensitive ones will feel the difference.
So in the end... will said driver notice it as in a softer bit less controlled ride or as in a but more harsh jarring ride?

Last edited by Jerich0; 03-04-2020 at 12:33 PM..
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      03-07-2020, 11:57 AM   #46
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Ive had spacers on my current M3 and my previous M3. No issues during high speed runs or canyon carving. All good here.
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      03-08-2020, 08:33 AM   #47
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"I wouldn’t say “anyone”. It is probably not noticeable to a majority of drivers, but some more sensitive ones will feel the difference."

And half of those wouldn't notice unless they were told that spacers were added.
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      03-10-2020, 01:12 PM   #48
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Quote:
Originally Posted by N1rve View Post
Quote:
Originally Posted by Jason60051 View Post
When ever you change something like that you run the risk of changing the characteristics of the driving dynamics. I've been on the fence about spacers...I'm not worried so much about the ride quality changing more so the damage it will cause the paint.

Question for those of you that may know the answer...why didn't bmw engineer the car to have the wheels closer to the edge of the fenders? Was it to protect the paint...or are the wheels location specifically designed not to be pushed out another 10-12 mm? I've always thought of spacers as purely cosmetic and have actually been told by some it can void the warranty.
If I can recall, there's some law about how much the tire can stick out past the the fender (which is basically none). All those lifted trucks that have narly poke are against the law. Learned about this on the Lexus GS-F and RC-F platform where they have this extra piece on the rear quarter panel arch to extend the rear quarter panel to exceed the the wheel/tire. In short, the wheel/tire needs to be under the fender.

https://cdn.shopify.com/s/files/1/20...g?v=1497772651

Fun fact, there's also a law that prevents the exhausts from sticking out too far to prevent risk of burning your leg if you accidentally graze the rear bumper. Rear bumper should cover the exhaust and should not stick past the exhaust. Learned this on the FRS/BRZ/86 Platform regarding why the JDM exhaust tips are longer than the USDM one.
To add to this, I believe it's a requirement for German TUV standards. A certain gap needs to exist to accommodate snow chains. They're compulsory in some parts of Europe.
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      10-01-2020, 12:42 AM   #49
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Quote:
Originally Posted by Jerich0 View Post
Quote:
Originally Posted by Racer20 View Post
Wheel spacers absolutely affect ride. They change the length of the lever arm by which the tire applies load to the spring and damper, so they will effectively soften both while magnifying the effects of road bumps and reducing the unsprung mass natural frequency.

I'm pretty confident I could feel the difference, but that's what I do for a living. I would guess most people wouldn't notice, but some would.
Hey Racer20,

Great to have you here... can you please clarify how they soften the ride but at the same time transmit more imperfections of the road to the driver because the latter is what I felt, a much harsher ride.

Thanks!
JC
Quote:
Originally Posted by Jerich0 View Post
Quote:
Originally Posted by Racer20 View Post
Wheel spacers absolutely affect ride. They change the length of the lever arm by which the tire applies load to the spring and damper, so they will effectively soften both while magnifying the effects of road bumps and reducing the unsprung mass natural frequency.

I'm pretty confident I could feel the difference, but that's what I do for a living. I would guess most people wouldn't notice, but some would.
Hey Racer20,

Great to have you here... can you please clarify how they soften the ride but at the same time transmit more imperfections of the road to the driver because the latter is what I felt, a much harsher ride.

Thanks!
JC
Apologies on bumping an older thread but didn't want to create a new one without doing a search. You aren't crazy and my shop installed 12F/10R and the vibration from uneven pavement or washed out pavement is driving me a little crazy. An important aspect that I humbly believe most are leaving out could have something to do with the wheel size. I'm on a 2018 F82 ZCP with 20" wheels and can feel every vibration and changing to sport or comfort has no impact on the vibration I feel in the car. I can feel a difference cornering for sure but the adaptive suspension has no impact whatsoever in reducing the road vibration. I've checked for codes and nothing comes back as faulty. Many people responding have posted pictures with 19" wheels. Is It possible the extra rubber sidewall buffers the vibration better than the 20"? This is my third M3/M4 that I've owned and stunned that spacers could change the driving dynamic as much as they have. I'm installing KW-HAS springs and will lower the car a bit and get it realigned. I'm hoping the new springs and alignment will help reduce the vibration. Any feedback on this would be greatly appreciated.

Thank you for asking this and thanks to Racer20 for the response.
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      10-01-2020, 02:06 AM   #50
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Quote:
Originally Posted by Kooch View Post
No noticeable change in ride quality. You will notice more debris and chipping along the side of the car though with more flush mounted wheels. I had additional PPF added behind the rear wheel, in front of the rear wheel and along the rocker panel on each side. Only missing protection I'm now finding is the front door panels.
+1. If you install spacers, PPF is the way to go. A cheaper alternative would be TLGs mud flaps or another like product. For what it's worth, some in my circle have both.
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      10-01-2020, 02:54 AM   #51
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I've had an average of 3 sets for each of the 6 cars that I've owned and never have I felt a difference in ride quality.
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      10-01-2020, 06:47 AM   #52
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I just installed 12mm spacers all around yesterday. First time ever using spacers. Zero vibrations on my long test drive at various speeds.

I have 19's but took the time to brush off all debris/rust on the hub and mating surfaces behind the wheel itself.
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      10-01-2020, 07:28 AM   #53
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I just installed Turner's 10mm front and rear with integrated hub lip (genius) and there is no difference in ride quality. The only difference is when I look down the line from the front or rear it sits as I might imagined it should have from the factory!
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      10-06-2020, 02:10 PM   #54
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Some may not notice the difference with spacers but a spacer will cause the suspension to ride softer.

Think of a torque wrench: the farther away from the pivot point, the less force is needed.
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      10-07-2020, 04:34 AM   #55
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Adding 10-15mm might be minuscule if you consider the length of the suspension piece along the axis that you're adding it to. Without precise instruments, there's no way to tell if it's harsher.
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      10-07-2020, 07:50 AM   #56
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Simple answer: neither. The spacers aren't going to alter the spring rates or shock valving.
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      10-07-2020, 12:19 PM   #57
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Quote:
Originally Posted by Dawg1998 View Post
Apologies on bumping an older thread but didn't want to create a new one without doing a search. You aren't crazy and my shop installed 12F/10R and the vibration from uneven pavement or washed out pavement is driving me a little crazy. An important aspect that I humbly believe most are leaving out could have something to do with the wheel size. I'm on a 2018 F82 ZCP with 20" wheels and can feel every vibration and changing to sport or comfort has no impact on the vibration I feel in the car. I can feel a difference cornering for sure but the adaptive suspension has no impact whatsoever in reducing the road vibration. I've checked for codes and nothing comes back as faulty. Many people responding have posted pictures with 19" wheels. Is It possible the extra rubber sidewall buffers the vibration better than the 20"? This is my third M3/M4 that I've owned and stunned that spacers could change the driving dynamic as much as they have. I'm installing KW-HAS springs and will lower the car a bit and get it realigned. I'm hoping the new springs and alignment will help reduce the vibration. Any feedback on this would be greatly appreciated.

Thank you for asking this and thanks to Racer20 for the response.
It’s not only the tire sidewall but also the wheel weight. Those 666M wheels are real boat anchors. Increased unsprung weight reduces the ability of the wheel to react to road imperfections.
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      10-07-2020, 12:20 PM   #58
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Quote:
Originally Posted by RoundelM3 View Post
Simple answer: neither. The spacers aren't going to alter the spring rates or shock valving.
Wrong, they do. However, if one is able to feel it is another question.
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      03-15-2021, 06:55 PM   #59
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Old post but I removed my spacers to pass a vehicle inspection issued by a bored popo and I instantly felt a difference. Car felt less bouncy over crappy roads.

My car is quite low with 1/4" wheel gap so everything is amplified.
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