[jbazz]

Originally Posted by ryo-

does a larger rotor affect braking performance even though the caliper and pads are the same? afaik, the surface area that the pads will contact is the same so there shouldn't be any "performance" gain? the only thing I can think of is heat dissipation but I don't think it's that much of a size difference for it to matter.

If by performance you mean stopping distance from 60 to 0, then no. The benefit of larger rotors (assuming same pads and same calipers) is increased thermal capacity, and less brake fade, more consistent braking performance over repeat and high speed applications (track use). Keep in mind you are adding unsprung weight to achieve this. The easiest way to improve braking performance & stopping distance is tire selection.

[sbarrang]

Originally Posted by danallxt

Yup, we need some specifics here, what size are your rotors, front and rear, what about calipers, have you verified they are "bigger" than stock. (note: i would like to have it verified the size of the rotors and calipers of the ZTK package since there is no mention of brakes in the description, yet i have come to believe the front rotors are larger (374MM?) yet calipers are the same. So can folks with that option verify?

Rotors are bigger in 33T M Technik package, not sure if calipers are bigger but are different for sure because of installation points.

[danallxt]

Ok, glad we got that cleared up, all because BMW is so stingy with spec details.

[Vancouver_M440]

Is there any difference between the M sport brakes option on the car vs the M performance brake package that's an accessory? I would have thought it's the same though the photo seems to show cross drilled rotors compared to the standard vented discs on the car. Not sure if the photo is actually just generic image or the actual ones. Also I don't know if it uses different pads compared to the M sport brakes. I was under the impression that M Perf kit was for those who didn't get them on say a 230i and wanted them later.

[Gavatron1]

Originally Posted by Vancouver_M5

Is there any difference between the M sport brakes option on the car vs the M performance brake package that's an accessory? I would have thought it's the same though the photo seems to show cross drilled rotors compared to the standard vented discs on the car. Not sure if the photo is actually just generic image or the actual ones. Also I don't know if it uses different pads compared to the M sport brakes. I was under the impression that M Perf kit was for those who didn't get them on say a 230i and wanted them later.

I don't seem to suffer the soft brake feel on my m240. For a reference I have previously owned a M3CS and a M3competiton both f80 cars.

I really think on a track it might be different when pushed hard over many laps however I am using my car as a spirited daily not a track car.

I have taken a photo of my "black" front wheel and brake vs a m440i from the dealer I went to today as a reference. I think they are the same.

I am also again adding the image of a upgrade from the BMW web site. Maybe those still unsatisfied and with track aspiration could head this way. Or, upgrade to a race pad with dot 5 fluid.

Hope this all helps

[Gavatron1]

Originally Posted by Gavatron1

I don't seem to suffer the soft brake feel on my m240. For a reference I have previously owned a M3CS and a M3competiton both f80 cars.

I really think on a track it might be different when pushed hard over many laps however I am using my car as a spirited daily not a track car.

I have taken a photo of my "black" front wheel and brake vs a m440i from the dealer I went to today as a reference. I think they are the same.

I am also again adding the image of a upgrade from the BMW web site. Maybe those still unsatisfied and with track aspiration could head this way. Or, upgrade to a race pad with dot 5 fluid.

Hope this all helps

Now my m240 brake. Sorry I could not load in last post.

Just for a reference of ultimate brakes, I include a photo of the system on the M5 competition.

[solstice]

Originally Posted by Gavatron1

I don't seem to suffer the soft brake feel on my m240. For a reference I have previously owned a M3CS and a M3competiton both f80 cars.

I really think on a track it might be different when pushed hard over many laps however I am using my car as a spirited daily not a track car.

Mirrors my view and experience precisely. I’m traveling currently and have a rental so I have up to date experience of soft brakes ( nearly crashed into the car in front of me at an off-ramp the first time I needed to break at speed before I adapted to them.) Now when I get home I’ll likely lockup the seat belt the first drive in the M240i…

[danallxt]

Originally Posted by Vancouver_M5

Is there any difference between the M sport brakes option on the car vs the M performance brake package that's an accessory? I would have thought it's the same though the photo seems to show cross drilled rotors compared to the standard vented discs on the car. Not sure if the photo is actually just generic image or the actual ones. Also I don't know if it uses different pads compared to the M sport brakes. I was under the impression that M Perf kit was for those who didn't get them on say a 230i and wanted them later.

On the M240x the M sport brakes are standard. The M Performance brake setup is larger cross drilled/grooved rotors (374? front), different pads, and i'm pretty sure a different caliper.
I dislike BMW using M Sport connotation for a whole range of different stuff..trim level etc, gets confusing.

[hermiti]

I'm not experiencing any brake issues. I'm wondering if there is a difference between red and blue calipers, or if there are different pads that are being distributed because of part shortages. If anything the breaks seem extremely touchy and seem to bite unexpectedly at low speeds. The only thing that bothers me in regards to the breaking is how the car shifts during breaking, reminds me of a truck in the way that it shifts forward, perhaps I am feeling the weight of the vehicle or it has a higher center of gravity.

I would be curious if the people that have breaking issues have blue calipers.

[Thelof]

Originally Posted by Gavatron1

Can you please take a photo of your performance brakes? There is no option in my region to add these so I am hoping we have them as standard. ��

Here they are:

[VIERsr]

With the cooling and high performance tires package you have enough braking power for the road, braking distances are basically the same as on the outgoing M2.
The problem is the pedal feel, which is rather poor and I'm not sure you can fix it with aftermarket rotors or pads.

[danallxt]

Originally Posted by VIERsr

With the cooling and high performance tires package you have enough braking power for the road, braking distances are basically the same as on the outgoing M2.
The problem is the pedal feel, which is rather poor and I'm not sure you can fix it with aftermarket rotors or pads.

Agree, aftermarket stainless steel brake lines would likely help (somewhat).

[Gavatron1]

Originally Posted by Thelof

Here they are:

Thank you for these photos. These do look like different rotors to mine. In fact I looked at my colleagues M135i which is just over a year old (latest gen) and they look the same. Slightly bigger. If anything these should stop better.

As mentioned earlier, I don't find the brake feel a problem. Compared to even my last f80 M3!

The car is epic! Such a good thing!

[amerln]

Is there an update for model year 2023?
Always the big one, front in 374mm, in blue?
(red only with M Sport Package Pro)

[CJ2018]

Just moved from 2022 to 2023 model ( M240). Huge difference in brake feel (better on 2023) did not get the cooling package. Just saying.

[Coconut]

Originally Posted by amerln

Is there an update for model year 2023?
Always the big one, front in 374mm, in blue?
(red only with M Sport Package Pro)

I ordered my 2023 with the ZTK package without shadowline trim and it came with the larger front 374mm rotors and larger blue calipers. If you pick shadowline trim the calipers will be red.

[XC3LLR8]

Originally Posted by Coconut

I ordered my 2023 with the ZTK package without shadowline trim and it came with the larger front 374mm rotors and larger blue calipers. If you pick shadowline trim the calipers will be red.

Is that a 2023 thing? In 2022 the choice of caliper color was completely independent, if I recall.

[Coconut]

Originally Posted by XC3LLR8

Is that a 2023 thing? In 2022 the choice of caliper color was completely independent, if I recall.

Not sure myself.

[donm527]

Originally Posted by CJ2018

Just moved from 2022 to 2023 model ( M240). Huge difference in brake feel (better on 2023) did not get the cooling package. Just saying.

Hmm… wondering if they made changes/updates to components like brake cylinder. Be interesting if had access to part numbers.

Wouldn’t be surprising if they made incremental changes or supply change. They’ve had a year of reviews talking about brake feel.

[XC3LLR8]

Originally Posted by donm527

Hmm… wondering if they made changes/updates to components like brake cylinder. Be interesting if had access to part numbers.

Wouldn’t be surprising if they made incremental changes or supply change. They’ve had a year of reviews talking about brake feel.

I doubt it. If anything it seems BMW has been cutting corners on the ‘23 to save money. My guess is he got used to the ‘22 and then got in a ‘23 with fresh pads & fluid.

Muscle memory can quickly become complacent. If you want to feel how good your brakes are just stomp on the brake pedal with your left foot (make sure no one’s behind you).

[CJ2018]

Trust me there is difference. The auto hold was not kicking in until hard press on the brake in my 22 model. The 23 model just a slight press and vola.

[XC3LLR8]

Originally Posted by CJ2018

Trust me there is difference. The auto hold was not kicking in until hard press on the brake in my 22 model. The 23 model just a slight press and vola.

Yeah, my auto hold requires a slightly firmer press than what it would take to simply stop the car from rolling. However, I'm not sure this is a true indication the brakes are better on '23's, as this is likely related to software and/or a sensor.