[PNTDG42]

I went with the ZTK package primarily due to the big brakes. I thought they all had the underbody oil cooler, so I just learned that detail now thanks to this thread. I knew there was some type of upgraded cooling, but I figured it was a thicker radiator or something. The M340i group seems to be more familiar with the ZTK package including the larger brakes, you can find them talking about it a lot more. They should measure about 14.75", (374mm). The swept area is just huge, but I feel like the pad width looks smaller than I am used to seeing on brakes of this size.

When learned about the ZTK larger brakes back in September when I ordered, what I found was the quickest and easiest way to identify them over standard brakes, was this sort of "rib" or step on the openings of the calipers, that I have highlighted in green on your photo.

[XC3LLR8]

Originally Posted by PNTDG42

I went with the ZTK package primarily due to the big brakes. I thought they all had the underbody oil cooler, so I just learned that detail now thanks to this thread. I knew there was some type of upgraded cooling, but I figured it was a thicker radiator or something. The M340i group seems to be more familiar with the ZTK package including the larger brakes, you can find them talking about it a lot more. They should measure about 14.75", (374mm). The swept area is just huge, but I feel like the pad width looks smaller than I am used to seeing on brakes of this size.

When learned about the ZTK larger brakes back in September when I ordered, what I found was the quickest and easiest way to identify them over standard brakes, was this sort of "rib" or step on the openings of the calipers, that I have highlighted in green on your photo.

Good observation! I hadn't noticed that in the comparison picture on the first page.

[Saturns]

Yes the ZTK (ZOW in canada) is:

ZOW M Enhanced Track Package $3,500
1W0 19" M Lt/Aly Wheels, Double-Spoke, 893 M, Jet Black, Burnished, HP Non-RFT x
(19x8.5, 245/35 R19 front and 19x9.5, 255/35 R19 rear)
2VF Adaptive M Suspension x
33T M Technology Package x
*33T includes larger 374mm front brake rotors (+26mm) and dedicated engine oil cooler for increased heat capacity for braking
system and drivetrain.1W0 wheels include high performance tires and add wheel arch extensions in body colour.

So rotors are 14.7244 inches. So 1.02 inch bigger than M brakes.

[XC3LLR8]

Originally Posted by Saturns

Yes the ZTK (ZOW in canada) is:

ZOW M Enhanced Track Package $3,500
1W0 19" M Lt/Aly Wheels, Double-Spoke, 893 M, Jet Black, Burnished, HP Non-RFT x
(19x8.5, 245/35 R19 front and 19x9.5, 255/35 R19 rear)
2VF Adaptive M Suspension x
33T M Technology Package x
*33T includes larger 374mm front brake rotors (+26mm) and dedicated engine oil cooler for increased heat capacity for braking
system and drivetrain.1W0 wheels include high performance tires and add wheel arch extensions in body colour.

So rotors are 14.7244 inches. So 1.02 inch bigger than M brakes.

Why couldn't that description have been on BMW's website this time last year?

And if that "Lt/Aly Wheels" is short for "Light/Alloy Wheels", then that's a f'n joke! These 893 wheels are anything but light!

[PNTDG42]

I think I paid $2500 for the ZTK option. I mean, this is a clear no-brainer in the value department. The only reason everyone isn't getting it is because they are not providing the information. I only knew through digging around and pure luck of stumbling on details.

I think I saw some other guys unhappy about to learn after vehicle delivery, that they cannot add the drive recorder later if they didnt get the parking assistance package? I am new to BMW as of May last year.. if there is one thing I have learned about buying a new one, is just do not skip any of the big packages because you might be passing up more than they immediately make clear.

And ya, there is nothing light weight about these 893s. Pretty sure my 20x12" with 325s on my other car are lighter than these.

[XC3LLR8]

Tire & wheel weights for ZTK package:

245/35-19 Michelin PS4S (Star BMW) 8.5"
255/35-19 Michelin PS4S (Star BMW) 9.5"

Front tire/wheel: 51.4 lbs
Rear tire/wheel: 54.6 lbs

Front tire: 23 lbs
Rear tire: 24 lbs

Front wheel: 28.4 lbs
Rear wheel: 30.6 lbs

Tire weights from tirerack.com
Includes wheel weights, valve stems, and sensors.

[marcsg42]

I have non ZTK I have no problems with the brakes they feel extremely good to me,had the car severel times to 145 mph and brakes very well,the biggest reason I didn’t go for the ztk package was simply I wanted black rims,but after finding out every thing it comes with I would imagine it’s got to be close to 60-80lbs heavier between oil cooler,extra cooling fan,bigger calipers,bigger rotors, wider rims upfront, wider tires that’s got to add up to some weight,I wouldn’t mind bigger rotors and calipers but so far just don’t see the need ,glad I don’t have that sketchy oil cooler tho

[Saturns]

Originally Posted by XC3LLR8

Tire & wheel weights for ZTK package:

245/35-19 Michelin PS4S (Star BMW) 8.5"
255/35-19 Michelin PS4S (Star BMW) 9.5"

Front tire/wheel: 51.4 lbs
Rear tire/wheel: 54.6 lbs

Front tire: 23 lbs
Rear tire: 24 lbs

Front wheel: 28.4 lbs
Rear wheel: 30.6 lbs

Tire weights from tirerack.com
Includes wheel weights, valve stems, and sensors.

My winter wheel setup in 18" was also only 18lbs each

My summer setup wheels were similar weight at ....19-21lbs

[Red_sir]

Originally Posted by meshuggah

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

I've probably seen the same threads and comments as you. My general impressions from threads and comments are the majority of owners, myself included, are satisfied with the brakes with or without ZTK pack.

[PP3121]

Originally Posted by jpcoop

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.

This seems to capture my experience very well; had to get used to the feel as the brakes are very different from previous experiences.

[Thundernight]

Originally Posted by XC3LLR8

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.

I'd say that even with the ZTK brakes, we'd be better off with an improved racing pad. I took my ZTK equipped car to Thompson Speedway last August and cooked the brakes after three laps. Looking to upgrade to a better pad as soon as one becomes available.

Does anyone know if the brake pads are the same for both caliper designs?

[LivingInSalt]

Originally Posted by Thundernight

Does anyone know if the brake pads are the same for both caliper designs?

pretty sure they're not. There are old threads in the brakes subforum you can search through

[XC3LLR8]

Originally Posted by Thundernight

I'd say that even with the ZTK brakes, we'd be better off with an improved racing pad. I took my ZTK equipped car to Thompson Speedway last August and cooked the brakes after three laps. Looking to upgrade to a better pad as soon as one becomes available.

Does anyone know if the brake pads are the same for both caliper designs?

If you’re tracking your M240i, I’d recommend upgrading your brake fluid, pads, and tires…and in that order.

[Thundernight]

Originally Posted by XC3LLR8

If you’re tracking your M240i, I’d recommend upgrading your brake fluid, pads, and tires…and in that order.

Agreed. I'll be doing the following mods in the Spring:

1. Motul RBF 660 brake fluid
2. Pagid RS29 pad compounds all-round
3. Apex SM10 squared configuration with 265/35/19 Pilot Sport Cup 2 tires

Will be interesting to see the performance difference. It's not going to be a dedicated track car, but will be a good secondary option (for track days) if my miata has race damage..

[XC3LLR8]

Originally Posted by Thundernight

Agreed. I'll be doing the following mods in the Spring:

1. Motul RBF 660 brake fluid
2. Pagid RS29 pad compounds all-round
3. Apex SM10 squared configuration with 265/35/19 Pilot Sport Cup 2 tires

Will be interesting to see the performance difference. It's not going to be a dedicated track car, but will be a good secondary option (for track days) if my miata has race damage..

I miss my son's NC3, such a great momentum car with the Ohlins!

Your changes to the M240i should make a night & day difference on the track.

[apez]

For a non ZTK car, do you all have any other recommendations for autocross and maybe eventually tracking the car?

I have heard brake lines might make a difference? What about alignment/camber?

[XC3LLR8]

Originally Posted by apez

For a non ZTK car, do you all have any other recommendations for autocross and maybe eventually tracking the car?

I have heard brake lines might make a difference? What about alignment/camber?

For autocross you'll want tires, alignment and pads...in that order. Autocross is too short/slow to matter for brake fluid, and SS brake lines won't make any difference you'll notice.

[heelsmj]

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.

I am one of those people. I was told that it was only the different rims and tires as well as the oil cooler. Eveything I read online said US spec cars already had the bigger brakes. Since I already had a set of Pilot 4S tires I didn’t opt for the ZTK package. If I knew you get bigger brakes also I would have gotten it. So far the only thing I am disappointed in with this car are the brakes. My M340 felt way better. I am hoping it’s just the pedal feel and not actually brake performance and that it can be improved wiht new brake lines.

[danallxt]

If you try different lines let us know the results. Also you might consider different pads as well, i noticed a big difference in initial bite of the brakes compared to my previous ride and it may have to do with pad compound. Not having done any 60-0 measurements to compare i have no idea if these are overall any better or worse than that car, it's just the feel is different...no biggie for me.

[XC3LLR8]

Unless you’re using the car for a lot of track duty I wouldn’t worry about not having the slightly larger brakes. Most of their performance will come from increased cooling.

SS brake lines won’t make much noticeable difference, but different pads certainly can. The key is to find the combination you like with initial bite, fade, noise, and the amount of dust you can live with. Unfortunately, I don’t think there’s a ton of options for our car.

And if you are tracking it for more than a few hard laps, racing brake fluid is just as important as the pads.

[MPR]

From what I read, it's only for keeping the brakes cooler (and looking bigger) and not providing additional stopping power. A guy that lives down the street from me has a non-ZTK M240 and has complained about the brakes in a convo I had with him, so who knows.

[hokejka]

Originally Posted by Thundernight

Agreed. I'll be doing the following mods in the Spring:

1. Motul RBF 660 brake fluid
2. Pagid RS29 pad compounds all-round
3. Apex SM10 squared configuration with 265/35/19 Pilot Sport Cup 2 tires

Will be interesting to see the performance difference. It's not going to be a dedicated track car, but will be a good secondary option (for track days) if my miata has race damage..

Any update? Would love to see/hear how it went..