[cb2004mj]

Brake pad question. So noticed members on the g chassis side recommend the powerstop pads part number 16-1868 which is the ceramic pad z16 type. But power stop also sells a z23 version part number z23-1868 which is a carbon ceramic version which is supposed to be same low dust formula but 20% more bite and braking power. Does anyone here have experience with the later carbon versions or first hand with both pads?

[Hoa]

For large 395 calipers, E70 X5M rotor is the best match. It give you more contact area because the hat is smaller. The M5 rotors are made for M5 calipers where it is short and wide. G series calipers are narrow and tall making it not a good match with M5 rotors.

[Blue Angel]

Originally Posted by Hoa

For large 395 calipers, E70 X5M rotor is the best match. It give you more contact area because the hat is smaller. The M5 rotors are made for M5 calipers where it is short and wide. G series calipers are narrow and tall making it not a good match with M5 rotors.

Agreed.

[cb2004mj]

Originally Posted by Hoa

For large 395 calipers, E70 X5M rotor is the best match. It give you more contact area because the hat is smaller. The M5 rotors are made for M5 calipers where it is short and wide. G series calipers are narrow and tall making it not a good match with M5 rotors.

Are the e70 x5m rotors the correct bolt pattern for the F10 chassis? I only have the one rotor as of now so I can def swap over. Now's the time while I gather the rest. Thanks gents for the insight, I appreciate it

[Hoa]

Yes, it is the same bolt pattern. BMW didn’t change the pattern until G series

[Blue Angel]

If you do the G caliper with the X5M rotors I think you’ll be the first I’m aware of. Looking forward to seeing it!

The 395mm rotor/caliper combo on the M850i looks awesome.

[Hoa]

I had that setup previously. Ended up putting 395 caliper into my X7 and used the 374 caliper from X7 on the F10. That way I can run 19” wheels on F10

[automaz_]

Anyone have a link for the 4mm spacers we need to install G12 calipers on a 535Xi F10

The link form minnpar doesn’t have the product anymore

Thanks

[Hoa]

https://www.messicks.com/part/86625256/washer

[Blue Angel]

Originally Posted by Hoa

I had that setup previously. Ended up putting 395 caliper into my X7 and used the 374 caliper from X7 on the F10. That way I can run 19” wheels on F10

This was a question I had about a 395mm setup on the front; whether a 19” wheel would fit.
My 19” 408m are designed to fit over the 400mm M5 caliper, but I’m not sure if the 395mm G caliper requires more or less clearance than the M5 caliper?

[Hoa]

Originally Posted by Blue Angel

This was a question I had about a 395mm setup on the front; whether a 19” wheel would fit.
My 19” 408m are designed to fit over the 400mm M5 caliper, but I’m not sure if the 395mm G caliper requires more or less clearance than the M5 caliper?

It actually does fit 19” but I didn’t like the way it looked because it’s too tight so I downgraded it. Rotors are about 5.5lbs difference in weight. That is a lot of extra rotating mass to slow down. 374 is a better option in my opinion since it’s lighter and cheaper to run

[Blue Angel]

5.5 lbs? That’s big. Do the X5M rotors have aluminum hats, or are they one-piece?

[Hoa]

Originally Posted by Blue Angel

5.5 lbs? That’s big. Do the X5M rotors have aluminum hats, or are they one-piece?

They are 2pc with aluminum hat. A lot of contact surface makes it heavy

[cb2004mj]

I'm going to weigh my aftermarket OEM size 348 rotors and the new e70 rotors when I do the swap. Also you have to consider wheel and tire weight. Most of us have up sized wheels and lots of these larger wheels are 5-15lb heavier than what the OEM car came with. Nobody even looks at that usually. My 20" wheels and tires are 2.1 lbs lighter than the OEM 18s. If my rotor weight it's 5-6lbs heavier I'm still only 2-3 lbs heavier than the OEM brakes, wheels and tires. Which isn't horrible. Have to look at complete picture. I'll try to get pics best I can of dimension changes, weights etc for the 395 swap sense besides HOA it doesn't seem like many have done it.

[Blue Angel]

Agreed completely. I have light weight wheels for both summer and winter, which are mostly offset by my brake upgrade, lol.

My 19x9 408m winter wheels are over 10lbs lighter than the 20x8.5/9 434m wheels that came on my car, and my rotary forged 20x9.5 summers are lighter than my winters.

If 20” BMW wheels never bent I’d understand the reason for their porky weight. They do and I don’t.

[Hoa]

If you compare wheel weight only then it’s not right. You would have to weigh it with tires because tire size matters with weight as well. I’m sure if you get Brembo or other brand rotors, they will vary in weight as well. I’m only comparing factory parts.

Addy27 have done it with X5M rotors and calipers. I’m sure many have done it but don’t post. I only post about them recently. I personally have done a few locally. I even upgraded G12 7 series to F90 M5 calipers. I don’t think it’s discussed in 7 forum either.

[cb2004mj]

Originally Posted by Hoa

If you compare wheel weight only then it’s not right. You would have to weigh it with tires because tire size matters with weight as well. I’m sure if you get Brembo or other brand rotors, they will vary in weight as well. I’m only comparing factory parts.

Addy27 have done it with X5M rotors and calipers. I’m sure many have done it but don’t post. I only post about them recently. I personally have done a few locally. I even upgraded G12 7 series to F90 M5 calipers. I don’t think it’s discussed in 7 forum either.

HOA do you do the approx 9mm of spacer with the big boy 395 calipers? That's approximately what I'm measuring with my test fit today and wanted to verify if you ran that as well previously

[Hoa]

Originally Posted by cb2004mj

HOA do you do the approx 9mm of spacer with the big boy 395 calipers? That's approximately what I'm measuring with my test fit today and wanted to verify if you ran that as well previously

I think it’s around 8mm with longer bolt. I also had to run wheel spacer with it. That’s the other reason why I didn’t like the setup

[cb2004mj]

Also...test fit went well. Got all my measurements and everything. Awaiting confirmation but appears 9mm spacing needed for the larger 395 calipers. My 20" wheels clear by a long shot. Got multiple pics for others to see but other wheels will obviously differ greatly. Only minor trim to the dust shield required. Maybe half inch both sides if that. I'll order the remaining parts, bolts, brake paint, etc and start prepping everything

[Blue Angel]

So the center of the 395mm G caliper is 4-5mm farther outboard than the 374mm G caliper? Am I understanding that right? Is it the case with both the F10 M5 and X5M discs?

[Hoa]

It’s not the caliper. It’s the rotor’s offset from the hat. The perfect rotor would measure 70mm from front of hat to back of rotor. If we find one, it will allow you to mount caliper without washers.

[Blue Angel]

Ah ok. It makes sense that the more in line everything is the less bending moment there will be. I wonder if the M5 uses the same front wheel bearing/hub as the regular RWD F10, or if the depth is at least the same?