[Gryph8n]

Originally Posted by R99

G20 M Perf are 374mm only, unlike the G30 / G11 M Perf option which is a 395mm caliper body.

I have tested the G30 / G11 395mm caliper (with disc) on the G20 hub and it fits perfectly.

If anyone is interested, I have several sets of 374mm and 395mm calipers for sale in the classifieds

Just to clarify, the G30/G11 395mm calipers will fit on the G20/G22 standard disc? Or do the discs need to be changed too? Thanks

[B58-M340iX]

Originally Posted by blau3er

Just adding this in here -

Confirmation that the F95 X5M calipers do indeed bolt right up onto the G20 (and rest of the G series range such as G30 G11 G15 G01 etc....)

Tried it on a G20 hub this evening!

Do the front and rear both fit? Do you (or someone else) have a write-up on any changes needed for installation? I'm getting closer to needing to replace my brakes, and I'd like to know if I can get some nice calipers bolted on soon

[blau3er]

Originally Posted by Gryph8n

Just to clarify, the G30/G11 395mm calipers will fit on the G20/G22 standard disc? Or do the discs need to be changed too? Thanks

395mm G series caliper is bolt on fitment to G20 - however you need the corresponding 395mm discs. You also need to make sure your wheels are large enough to accommodate them!

[blau3er]

Originally Posted by B58-M340iX

Do the front and rear both fit? Do you (or someone else) have a write-up on any changes needed for installation? I'm getting closer to needing to replace my brakes, and I'd like to know if I can get some nice calipers bolted on soon

Fronts fit, as per my post.

I do not have a rear G2x hub to test the rear fitment - but I suspect that they will….

[Tony Nguyen]

Still looking into g20 m340i brake options has anyone successfully fitted a g80 m3 comp set?

[blau3er]

Originally Posted by Tony Nguyen

Still looking into g20 m340i brake options has anyone successfully fitted a g80 m3 comp set?

Why would you do that when it would require an aftermarket bracket and only provide a 380mm rotor?

[bimmerstar]

Originally Posted by blau3er

Why would you do that when it would require an aftermarket bracket and only provide a 380mm rotor?

weight.

the 395mm discs are HUGE and very heavy. also potentially requiring a 20" wheel which is even more weight.

[blau3er]

Originally Posted by bimmerstar

weight.

the 395mm discs are HUGE and very heavy. also potentially requiring a 20" wheel which is even more weight.

They will go under decent 19" aftermarket wheels (and some OEM wheels). I am running 400mm F10 M5 brakes on my F31 Touring under a 19" APEX wheel, with good clearance.

@tony - if you want to pursue 380mm G80 / 82 discs, you will need to have someone make some custom brackets for you.

There are already aftermarket brackets out there for F90 M5 calipers / discs onto G2x (essentially the same as these OEM brackets found on F95 calipers)

However not for the G8x set up.

[Gryph8n]

Originally Posted by blau3er

They will go under decent 19" aftermarket wheels (and some OEM wheels). I am running 400mm F10 M5 brakes on my F31 Touring under a 19" APEX wheel, with good clearance.

@tony - if you want to pursue 380mm G80 / 82 discs, you will need to have someone make some custom brackets for you.

There are already aftermarket brackets out there for F90 M5 calipers / discs onto G2x (essentially the same as these OEM brackets found on F95 calipers)

However not for the G8x set up.

Do you know if the F90 M5 calipers and discs fit onto a G2x with 19” Front OEM Wheel Rim Style 791M? If yes, do you have a link or part numbers for the needed replacement parts? Thanks

[blau3er]

F90 M5 calipers and discs will not fit, unless you obtain an aftermarket bracket.

By the far simplest solution for OEM BBK is the info I have already posted with regards to the F95 X5M set up, which is the same caliper body as F90, G80, G87 etc - but with the OEM steel bracket from factory. It uses a specific 395mm ///M disc that is shared between X3M and X5M.

With regards to wheel fitment, I cannot answer that for you - as I have never tried it. BMW offered the F90 M5 with a 19" wheel option though, so its possible but not guaranteed. It depends on the barrel clearance of your stock wheels.

[panki_86]

Today i got M performance brake rotors and pads mounted at dealership
My calipers (S33t option) are fine

[B58-M340iX]

Really would prefer to be able to go G80 brakes with an adapter bracket than try to find some X5M calipers. The G80 brakes are much cheaper, about 55% less.

[blau3er]

Originally Posted by B58-M340iX

Really would prefer to be able to go G80 brakes with an adapter bracket than try to find some X5M calipers. The G80 brakes are much cheaper, about 55% less.

Given an aftermarket bracket currently does not exist to facilitate this particular set up, you would also likely have the development costs of such a bracket to factor in to your overall costs.

Finding someone to make you one would involve you supplying them with a G2x hub, a G8x caliper and the G8x 380mm disc they can then do the development and make you a bracket. Just make sure you use someone reputable, not just any random machine shop!

Custom steel brackets alone (without development costs) are usually somewhere around £300/350 GBP per pair.

[B58-M340iX]

Originally Posted by blau3er

Given an aftermarket bracket currently does not exist to facilitate this particular set up, you would also likely have the development costs of such a bracket to factor in to your overall costs.

Finding someone to make you one would involve you supplying them with a G2x hub, a G8x caliper and the G8x 380mm disc they can then do the development and make you a bracket. Just make sure you use someone reputable, not just any random machine shop!

Custom steel brackets alone (without development costs) are usually somewhere around £300/350 GBP per pair.

Thanks for the info. I'm surprised this doesn't exist already given the G2x has been out now for 4+ years.

I'm interested in an upgrade for my brakes as the BM3 stage 2 e50 tune pushes 500awhp/550tq--ish. Stopping at higher speeds takes a toll on my non-ZTK 348mm brakes. The 374s would help, but I'm on the fence about whether the difference is worth the extra rotational weight between the 374 4-pistons and the 395mm 6-pistons.

[helmet91]

Have you done Castrol SRF (or equivalent Motul) fluid, stainless lines and better pads for the stock 348mm setup?

You might be surprised.

[rostrata]

Originally Posted by B58-M340iX

Thanks for the info. I'm surprised this doesn't exist already given the G2x has been out now for 4+ years.

I'm interested in an upgrade for my brakes as the BM3 stage 2 e50 tune pushes 500awhp/550tq--ish. Stopping at higher speeds takes a toll on my non-ZTK 348mm brakes. The 374s would help, but I'm on the fence about whether the difference is worth the extra rotational weight between the 374 4-pistons and the 395mm 6-pistons.

I’m now right in that ballpark power-wise. My 374mm brakes work incredibly well. Not just on street driving. Took it on a complex canyon run where’s it’s all-brake or all-gas and they did very well. That was also with Project Mu front pads though. But if you intend to go higher in power, then you may want to consider a full six-pot setup. If you’re essentially done with that part, 374 is a good sweet spot.

[pdxtiger]

Originally Posted by helmet91

Have you done Castrol SRF (or equivalent Motul) fluid, stainless lines and better pads for the stock 348mm setup?

You might be surprised.

I'm starting with this. What pads are you running? I used to run Textars on my Audi for the street and the bite, pedal feel, dust and noise were all excellent.

[helmet91]

Originally Posted by pdxtiger

I'm starting with this. What pads are you running? I used to run Textars on my Audi for the street and the bite, pedal feel, dust and noise were all excellent.

Only the stock for now… Hoping to switch out to Endless MX72+ in the spring.

[blau3er]

Originally Posted by B58-M340iX

Thanks for the info. I'm surprised this doesn't exist already given the G2x has been out now for 4+ years.

I'm interested in an upgrade for my brakes as the BM3 stage 2 e50 tune pushes 500awhp/550tq--ish. Stopping at higher speeds takes a toll on my non-ZTK 348mm brakes. The 374s would help, but I'm on the fence about whether the difference is worth the extra rotational weight between the 374 4-pistons and the 395mm 6-pistons.

I might develop one in time, but at the moment it's hard to ignore the plug and play functionality of the X5m option.

It would be quite easy to use the OEM X5m bracket as a template and reduce its mounting radius / height to suit the smaller rotor.

[blau3er]

I can confirm that the massive 398mm rear discs work on the G2x rear hub - I have just carried out a test fit.

[B58-M340iX]

Originally Posted by blau3er

I can confirm that the massive 398mm rear discs work on the G2x rear hub - I have just carried out a test fit.

Awesome, thanks for the update. I'm assuming the set screw hole doesn't line up just line the front?

[blau3er]

Originally Posted by B58-M340iX

Awesome, thanks for the update. I'm assuming the set screw hole doesn't line up just line the front?

Set screw lines up perfectly - will post pics later!

I will check the F95 X5m 380mm rear set up later too on G2x hub.