Rear brakes a disappointment?

Boostedphil698 · 08-24-2020, 11:35 AM

So what's up with the braking system on the new M3/M4? Single piston's in the rear, like come on, that's a step back from the last generation. It has always bothered me that the M5 had a single-piston rear, especially for the money! Maybe I'm just nitpicking but I find that the cars don't at least have 2 piston rears as a disappointment.

LOW4LYF · 08-27-2020, 10:21 AM

Why do you care so much about the number of pistons?

solstice · 08-27-2020, 10:42 AM

It should be more than enough for rears. The looks of the caliper is fine for rears, the huge drilled discs is all what is needed to look serious and badass.

xlover · 08-27-2020, 01:37 PM

Quote:

Originally Posted by LOW4LYF

Why do you care so much about the number of pistons?

Because racecar

LOW4LYF · 08-27-2020, 01:38 PM

Quote:

Originally Posted by xlover

Because racecar

Because sedan not a Racecar

xlover · 08-27-2020, 01:47 PM

Quote:

Originally Posted by LOW4LYF

Quote:

Originally Posted by xlover

Because racecar

Because sedan not a Racecar

Wait.... are the "because racecar" memes not a thing anymore

LOW4LYF · 08-27-2020, 02:15 PM

Quote:

Originally Posted by xlover

Wait.... are the "because racecar" memes not a thing anymore

It's played out...lol

Boostedphil698 · 08-27-2020, 02:52 PM

For the price they're gonna ask, at least go fixed all the way around.

Holset · 08-27-2020, 04:28 PM

Former M boss Albert Biermann was once asked why the F10 M5 only had floating one piston rear calipers.
And his answer was that there was no one that makes fixed multiple piston rear calipers with electronic parking brake ,this was back in 2011.

But Porsche is able to do it ,the Panamera for example has upp to 4 or maybe 6 pistons at the rear for some time now.

Most of the braking are done with the front brakes but i agree that the rear floaters looks a bit cheap.

themnmd · 08-27-2020, 04:36 PM

Quote:

Originally Posted by LOW4LYF

Why do you care so much about the number of pistons?

Most of the stopping force is done by the front breaks

Encanto · 08-27-2020, 07:59 PM

Imagine Brembo offering a 4-piston, electronic rear caliper replacement for this M3 (and for all BMW with the new electronic parking brake) as an aftermarket kit... that would be a hot seller. These sliding calipers are sh*t.

Boostedphil698 · 08-27-2020, 08:31 PM

It's a cost cutting measure, it's cheap in my opinion.

GregW / Oregon · 08-27-2020, 09:07 PM

Quote:

Originally Posted by 435i_Phil

So what's up with the braking system on the new M3/M4? Single piston's in the rear, like come on, that's a step back from the last generation. It has always bothered me that the M5 had a single-piston rear, especially for the money! Maybe I'm just nitpicking but I find that the cars don't at least have 2 piston rears as a disappointment.

Same as the F80/82. They work fine and look okay. This is on my ‘15 M4:

Boostedphil698 · 08-27-2020, 10:44 PM

Quote:

Originally Posted by GregW / Oregon

Quote:

Originally Posted by 435i_Phil

So what's up with the braking system on the new M3/M4? Single piston's in the rear, like come on, that's a step back from the last generation. It has always bothered me that the M5 had a single-piston rear, especially for the money! Maybe I'm just nitpicking but I find that the cars don't at least have 2 piston rears as a disappointment.

Same as the F80/82. They work fine and look okay. This is on my ‘15 M4:

Those are two piston rears on your M4.....

F85MTuNED · 08-27-2020, 10:59 PM

Quote:

Originally Posted by GregW / Oregon

Quote:

Originally Posted by 435i_Phil

So what's up with the braking system on the new M3/M4? Single piston's in the rear, like come on, that's a step back from the last generation. It has always bothered me that the M5 had a single-piston rear, especially for the money! Maybe I'm just nitpicking but I find that the cars don't at least have 2 piston rears as a disappointment.

Same as the F80/82. They work fine and look okay. This is on my '15 M4:

Come on now Greg... come on...lol

brad850csi · 08-27-2020, 11:20 PM

Quote:

Originally Posted by Encanto

Imagine Brembo offering a 4-piston, electronic rear caliper replacement for this M3 (and for all BMW with the new electronic parking brake) as an aftermarket kit... that would be a hot seller. These sliding calipers are sh*t.

It exists, check out the black cylinder at the right side of the caliper and the sliding hardware arrangement

https://www.ebay.com/itm/Ferrari-488...-/153900942380

GregW / Oregon · 08-27-2020, 11:55 PM

Quote:

Originally Posted by 435i_Phil

Those are two piston rears on your M4.....

I thought 4-piston fixed caliper front, 2-piston fixed caliper rear. This is them just after painting. Don’t think rears are one-piston sliding. Same calipers as these: https://www.ecstuning.com/b-genuine-...yABEgKnRPD_BwE

frankchn · 08-28-2020, 12:37 AM

The M5 and M8 both have single piston floating rear brake calipers, even on the optional carbon ceramics package.

GregW / Oregon · 08-28-2020, 12:39 AM

Quote:

Originally Posted by frankchn

The M5 and M8 both have single piston floating rear brake calipers, even on the optional carbon ceramics package.

Are you sure floating? M4’s are definitely fixed caliper.

solstice · 08-28-2020, 01:49 AM

If it’s good enough for tracking the M5cs with rumored 650hp and some extra 100lbs I think it should be a non issue on the M3/M4.

MFNATIK · 08-28-2020, 01:58 AM

Definitely cost cutting measure to save beaucoup bucks. Sliders are adequate but when you're paying upwards of 80k, you expect more. Definitely disappointing.

frankchn · 08-28-2020, 02:05 AM

Quote:

Originally Posted by GregW / Oregon

Are you sure floating? M4’s are definitely fixed caliper.

Yup, I drive an F90. I think this has something to do with how BMW integrates electronic parking brakes into the rear brake system. In any case, the brakes are sufficient.

08-24-2020, 11:35 AM	#1
Boostedphil698 Major 432 Rep 1,107 Posts Drives: 2015 BMW 435i Xdrive MSport Join Date: Mar 2020 Location: Greater Philadelphia iTrader: (0) Garage List 2015 BMW 435XI [0.00] 2009 Honda Civic [0.00]	Rear brakes a disappointment? So what's up with the braking system on the new M3/M4? Single piston's in the rear, like come on, that's a step back from the last generation. It has always bothered me that the M5 had a single-piston rear, especially for the money! Maybe I'm just nitpicking but I find that the cars don't at least have 2 piston rears as a disappointment. __________________ 2015 435i Xdrive (Klaus) Stanced 8th Gen Honda Civic (The daily)
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08-27-2020, 10:21 AM	#2
LOW4LYF Brigadier General 2162 Rep 4,106 Posts Drives: E92 M3 & F85 X5M Join Date: Jul 2016 Location: @Home iTrader: (1)	Why do you care so much about the number of pistons?
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08-27-2020, 10:42 AM	#3
solstice Major General 5457 Rep 7,037 Posts Drives: 2015 M3 6MT Join Date: May 2013 Location: Seattle iTrader: (0)	It should be more than enough for rears. The looks of the caliper is fine for rears, the huge drilled discs is all what is needed to look serious and badass.
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08-27-2020, 02:52 PM	#8
Boostedphil698 Major 432 Rep 1,107 Posts Drives: 2015 BMW 435i Xdrive MSport Join Date: Mar 2020 Location: Greater Philadelphia iTrader: (0) Garage List 2015 BMW 435XI [0.00] 2009 Honda Civic [0.00]	For the price they're gonna ask, at least go fixed all the way around. __________________ 2015 435i Xdrive (Klaus) Stanced 8th Gen Honda Civic (The daily)
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08-27-2020, 04:28 PM	#9
Holset Captain 267 Rep 634 Posts Drives: F90 M5 Comp LCI Join Date: Feb 2012 Location: Sweden iTrader: (0)	Former M boss Albert Biermann was once asked why the F10 M5 only had floating one piston rear calipers. And his answer was that there was no one that makes fixed multiple piston rear calipers with electronic parking brake ,this was back in 2011. But Porsche is able to do it ,the Panamera for example has upp to 4 or maybe 6 pistons at the rear for some time now. Most of the braking are done with the front brakes but i agree that the rear floaters looks a bit cheap.
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08-27-2020, 07:59 PM	#11
Encanto Colonel 1164 Rep 2,180 Posts Drives: 2021 X3 M40i Join Date: Nov 2015 Location: Ohio iTrader: (1)	Imagine Brembo offering a 4-piston, electronic rear caliper replacement for this M3 (and for all BMW with the new electronic parking brake) as an aftermarket kit... that would be a hot seller. These sliding calipers are sh*t.
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08-27-2020, 08:31 PM	#12
Boostedphil698 Major 432 Rep 1,107 Posts Drives: 2015 BMW 435i Xdrive MSport Join Date: Mar 2020 Location: Greater Philadelphia iTrader: (0) Garage List 2015 BMW 435XI [0.00] 2009 Honda Civic [0.00]	It's a cost cutting measure, it's cheap in my opinion. __________________ 2015 435i Xdrive (Klaus) Stanced 8th Gen Honda Civic (The daily)
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08-28-2020, 12:37 AM	#18
frankchn First Lieutenant 288 Rep 371 Posts Drives: F90 M5 Join Date: Aug 2015 Location: Bay Area iTrader: (0)	The M5 and M8 both have single piston floating rear brake calipers, even on the optional carbon ceramics package.
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08-28-2020, 01:49 AM	#20
solstice Major General 5457 Rep 7,037 Posts Drives: 2015 M3 6MT Join Date: May 2013 Location: Seattle iTrader: (0)	If it’s good enough for tracking the M5cs with rumored 650hp and some extra 100lbs I think it should be a non issue on the M3/M4.
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08-28-2020, 01:58 AM	#21
MFNATIK Blocked from G80/G82 for having an opinion 3497 Rep 3,729 Posts Drives: Trek Domane Join Date: Aug 2014 Location: Mexicali iTrader: (1)	Definitely cost cutting measure to save beaucoup bucks. Sliders are adequate but when you're paying upwards of 80k, you expect more. Definitely disappointing.
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