[XC3LLR8]

All this time...much thanks to what the BMW Genius told me...I thought the North American calipers on the ZTK and non-ZTK were the same size, and all G42's had an oil cooler. Well, apparently not...

Here you see the horizontal radiator on my ZTK car (ignore the red circle) vs. the absence of one on the lift...





And here you see the differences in caliper/rotor size on a ZTK vs. non-ZTK. Both pictures are using the same test-fit wheel (thanks Tom @ Apex) and you'll see how much dust shield is showing on the non-ZTK, as well as the amount of space from the calipers to the wheel, and even the amount of space between the pistons. At the bottom I reposted pics of the measurements from my car, which is about 14".

[BG42]

Yeah they mentioned a lot of this in their thread for wheel development.

[XC3LLR8]

Originally Posted by BG42

Yeah they mentioned a lot of this in their thread for wheel development.

Yeah, that's where I got some of this from but thought it would help to consolidate it into its own thread since it's been a significant topic of confusion for a long time.

[Saturns]

Can be retrofitted after the fact..if anyone wants to have it...

https://parts.bmwnorthwest.com/p/BMW...218666121.html

[MPR]

BMW should have provided more transparency on the package, specifically on the brakes, I think many more would have opted for the package had they known. IIRC, they only make mention of larger rotors with no mention of larger calipers. In addition, there were people on these forums arguing that there was no difference in caliper size between ZTK and non-ZTK.

I had to do my own research shortly after ordering and once I found there was a differerence in brakes I had my CA add the package

[XC3LLR8]

Originally Posted by Saturns

Can be retrofitted after the fact..if anyone wants to have it...

https://parts.bmwnorthwest.com/p/BMW...218666121.html

Good find. But my guess is more people would prefer to remove the oil cooler than add one, giving its location of being susceptible to damage.

[XC3LLR8]

Originally Posted by MPR

BMW should have provided more transparency on the package, specifically on the brakes, I think many more would have opted for the package had they known. IIRC, they only make mention of larger rotors with no mention of larger calipers. In addition, there were people on these forums arguing that there was no difference in caliper size between ZTK and non-ZTK.

I had to do my own research shortly after ordering and once I found there was a differerence in brakes I had my CA add the package

I was shocked a year ago at how little ANYONE from BMW could tell me what's included in the package, and it seems most still can't.

[MPR]

Originally Posted by XC3LLR8

I was shocked a year ago at how little ANYONE from BMW could tell me what's included in the package, and it seems most still can't.

It shows that BMW didn't share this detail with their CA's, which is crazy as they are the ones trying to sell the cars.

I spoke with someone that lives near me who has a non-ZTK 240 and he said the brakes do not stop the car very well. I haven't beaten on my ZTK brakes yet but in daily driving they seem fine. I remember reading that the larger pads/rotors/calipers do not improve braking, it only helps for keeping the brakes cooler, which is how BMW markets the package. Curious if the ZTK brakes do stop any better than non-ZTK.

[jpcoop]

Originally Posted by MPR

It shows that BMW didn't share this detail with their CA's, which is crazy as they are the ones trying to sell the cars.

I spoke with someone that lives near me who has a non-ZTK 240 and he said the brakes do not stop the car very well. I haven't beaten on my ZTK brakes yet but in daily driving they seem fine. I remember reading that the larger pads/rotors/calipers do not improve braking, it only helps for keeping the brakes cooler, which is how BMW markets the package. Curious if the ZTK brakes do stop any better than non-ZTK.

The regular M Sport brakes stop the car extremely quickly. It took a little getting used to the pedal feel though compared to my other two cars, so maybe that's where some of the complaints come from. Either that or parroting back stuff they heard on youtube.

[G42UPRA]

Originally Posted by MPR

I spoke with someone that lives near me who has a non-ZTK 240 and he said the brakes do not stop the car very well. I haven't beaten on my ZTK brakes yet but in daily driving they seem fine. I remember reading that the larger pads/rotors/calipers do not improve braking, it only helps for keeping the brakes cooler, which is how BMW markets the package. Curious if the ZTK brakes do stop any better than non-ZTK.

I've been reading and watching videos where people say the braking isn't the best. Now I'm wondering if those complaints are largely from people with the standard brake package? I hear enough other opinions that the brakes are great so it's confusing.

[Red_sir]

Originally Posted by meshuggah

I've been reading and watching videos where people say the braking isn't the best. Now I'm wondering if those complaints are largely from people with the standard brake package? I hear enough other opinions that the brakes are great so it's confusing.

Those are likely press cars that have been used and abused.

[Pentland]

Originally Posted by meshuggah

I've been reading and watching videos where people say the braking isn't the best. Now I'm wondering if those complaints are largely from people with the standard brake package? I hear enough other opinions that the brakes are great so it's confusing.

Ive had a E46 320d and a F36 430Dx and thought the standard (non M sport) brakes were shocking on both. Upgraded the latter to the slotted /dimpled M Performance kit and it was night and day. Like BMW lights, I don’t rate the standard brakes. Lol.

[G42UPRA]

Originally Posted by Red_sir

Those are likely press cars that have been used and abused.

You can find threads/comments on this forum of people complaining about the brakes so it's not just press cars.

[MACHT]

Originally Posted by meshuggah

I've been reading and watching videos where people say the braking isn't the best. Now I'm wondering if those complaints are largely from people with the standard brake package? I hear enough other opinions that the brakes are great so it's confusing.

I've both an M240 non-ZTK and an M8 competition with CCBs. Trust me the M240 brakes are fine!

[XC3LLR8]

Originally Posted by meshuggah

I've been reading and watching videos where people say the braking isn't the best. Now I'm wondering if those complaints are largely from people with the standard brake package? I hear enough other opinions that the brakes are great so it's confusing.

I remember many of those comments, and at the time assumed all M240i brakes were the same. When I finally took delivery I scratched my head thinking back on those comments as the brakes were great.

For anyone with the non-ZTK that feels the brakes could be better, I bet a different pad is all that's needed.

[XC3LLR8]

Originally Posted by MACHT

I've both an M240 non-ZTK and an M8 competition with CCBs. Trust me the M240 brakes are fine!

To be fair your carbon ceramic brakes need heat to function at their best (no doubt you already know this). While they have great heat resistance on the track, it comes at the cost of reduced performance on the street. I wouldn't be surprised if your brakes on your non-ZTK perform better than your carbons in daily driving conditions.

[Saturns]

Originally Posted by XC3LLR8

I was shocked a year ago at how little ANYONE from BMW could tell me what's included in the package, and it seems most still can't.

Same. They don't know if I have big brakes or not. Looks like the big red brakes to me. But I do have the M Sport Pro package.
But looking underneath I don't have extra oil cooler so I'm presuming it's standard M brakes.


Here in Canada we do not list ZTK as an option. Might be different in Canada.
I don't know if I have speed limiter. The cdn 2023 optiond list 'Increased Top Speed' as standard

[XC3LLR8]

Originally Posted by Saturns

Same. They don't know if I have big brakes or not. Looks like the big red brakes to me. But I do have the M Sport Pro package.
But looking underneath I don't have extra oil cooler so I'm presuming it's standard M brakes.


Here in Canada we do not list ZTK as an option. Might be different in Canada.
I don't know if I have speed limiter. The cdn 2023 optiond list 'Increased Top Speed' as standard

Head to a desolate highway and find out. lol

I know mine felt like I hit a wall at 157. It was still happily climbing, and then BOOOOM!

[danallxt]

've been reading and watching videos where people say the braking isn't the best. Now I'm wondering if those complaints are largely from people with the standard brake package? I hear enough other opinions that the brakes are great so it's confusing

.

Different folks have different expectations and reactions based on past experiences. I suspect some of it is that there is a distinct lack of initial bite, and it was quite noticeable compared to my previous ride. I did do a track day (mine is non ZTK) and didn't have a problem. But then again didn't really have a benchmark to compare how effective/lack of effectiveness they were. I do suspect that for normal driving the lack of initial bite may be what some folks perceive as "weak". Pads may make a difference or it just may be in the overall design of the system.

I was shocked a year ago at how little ANYONE from BMW could tell me what's included in the package, and it seems most still can't.

Agree totally....BMW is really amiss in this area. Some other manufactures when there is a brake or performance option will spell out exactly what that entails. BMW is awfully weak at that. I actually skipped that option because i could not definitively find out what it actually entailed.

[BG42]

I would assume regardless of what you got pads and maybe even rotors are a huge upgrade especially if you are tracking the vehicle. If the trackability of the 240 is super important one would think the M2 is a better choice all around.

[danallxt]

Originally Posted by BG42

I would assume regardless of what you got pads and maybe even rotors are a huge upgrade especially if you are tracking the vehicle.

yup, that goes for any vehicle

If the trackability of the 240 is super important one would think the M2 is a better choice all around.

The 240 is not really a focused track car, naturally the M2 would be a better choice if track duty was your primary priority.

[XC3LLR8]

Originally Posted by danallxt

.

I actually skipped that option because i could not definitively find out what it actually entailed.

The main reasons I went with the package were because I liked the looks of the 893's, didn't like the idea of 225's on the front (I've always been a big fan of Michelin PS4S), and I liked the stick-on fender flares. I knew I wouldn't track this car, nor let my son track it, so whatever the "cooling" features were didn't matter that much to me.