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      09-01-2023, 09:12 PM   #1
CrashCade
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Two Piece Lightweight Steel Rotor set

TLDR - I need lightweight 2 piece rotor recommendations. Labor Day weekend sale prices would make it even better!

Alright,

I have scoured for the last couple months for F&R real 2-piece rotors. I found the Racing Brake setup for $3100 with their own pads. Their rotors are 5mm smaller but seem pretty insignificant.

I recently went with EBC blue stuff pads on OEM rotors and when I installed the pads they were a little tight in the calipers. On my second bed in cycle the pads got hot and one hung up and get really really warm and has me leary of keeping these rotors on the cars the pads I had to sand some of the painted/powdercoat from the edge as it made the pad fit too tight.

I definitely need/want new rotors. Thinking of running two sets of pads, a track pad and a street pad that I will swap out before we hit the track.

With that said, who, besides Racing Brake makes a true two piece rotor for these cars? SHW does a pinned two piece (OEM) that has honestly done great. The dissipate heat and are genuinely great brakes.

Just looking for that next edge and first hand experience examples would be great!
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      09-01-2023, 10:04 PM   #2
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Quote:
Originally Posted by CrashCade View Post
TLDR - I need lightweight 2 piece rotor recommendations. Labor Day weekend sale prices would make it even better!

Alright,

I have scoured for the last couple months for F&R real 2-piece rotors. I found the Racing Brake setup for $3100 with their own pads. Their rotors are 5mm smaller but seem pretty insignificant.

I recently went with EBC blue stuff pads on OEM rotors and when I installed the pads they were a little tight in the calipers. On my second bed in cycle the pads got hot and one hung up and get really really warm and has me leary of keeping these rotors on the cars the pads I had to sand some of the painted/powdercoat from the edge as it made the pad fit too tight.

I definitely need/want new rotors. Thinking of running two sets of pads, a track pad and a street pad that I will swap out before we hit the track.

With that said, who, besides Racing Brake makes a true two piece rotor for these cars? SHW does a pinned two piece (OEM) that has honestly done great. The dissipate heat and are genuinely great brakes.

Just looking for that next edge and first hand experience examples would be great!
No one. I reached out to girodisc but they haven't done anything yet. Maybe if they see it's more of us out here who want rotors they will develop
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      09-01-2023, 10:35 PM   #3
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No one. I reached out to girodisc but they haven't done anything yet. Maybe if they see it's more of us out here who want rotors they will develop
I was trying to get G-Loc as well and they only have pads
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      09-02-2023, 08:30 AM   #4
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Aren’t there a few custom rotor shops? I recall reading only about the RB rotors but you could check with Coleman and others.
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      09-04-2023, 10:29 AM   #5
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Aren’t there a few custom rotor shops? I recall reading only about the RB rotors but you could check with Coleman and others.
I am unaware if Coleman or any others. I have a contact that has made custom hats for misc cars including doing custom hats for a 2005 excursion so we could run ginormous brakes and calipers due to what we were towing couple with 22” wheels and big tires. I figured worst case I can explore having him do the hats.
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      09-14-2023, 07:44 PM   #6
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I think someone in the m550 thread fabd up a pair
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      09-14-2023, 09:21 PM   #7
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Originally Posted by Bsm550 View Post
I think someone in the m550 thread fabd up a pair
I’ll see if I can find it.
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      10-06-2023, 02:48 PM   #8
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Quote:
Originally Posted by PDOT View Post
No one. I reached out to girodisc but they haven't done anything yet. Maybe if they see it's more of us out here who want rotors they will develop
I placed my order with Triton Motorsports today. They currently only have a street pad compound to go with their rotors so I am going to run those in hopes of decent braking and less dust/noise. As soon as their race pads are released I will try those for track days and provide som feedback.

They have a host of machine patterns for the disc with their J-hook being most aggressive.

Last edited by CrashCade; 10-06-2023 at 07:41 PM..
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      10-06-2023, 09:15 PM   #9
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Originally Posted by CrashCade View Post
I placed my order with Triton Motorsports today. They currently only have a street pad compound to go with their rotors so I am going to run those in hopes of decent braking and less dust/noise. As soon as their race pads are released I will try those for track days and provide som feedback.

They have a host of machine patterns for the disc with their J-hook being most aggressive.
They offer rotors for the F90?
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      10-06-2023, 10:32 PM   #10
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They offer rotors for the F90?
Yes sir. Mine should be here in 3 weeks or so.

https://www.tritonmotorsportsusa.com/product-page/bmw-X5M-X6M-2pc-front-and-rear-brake-discs
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      10-11-2023, 06:48 PM   #11
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Thanks for the link and heads up on this Crash! I just emailed them as well, as I would love a set for my 'new to me' M5!
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      10-11-2023, 07:48 PM   #12
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I did not see the weight listed for the front or rear rotors so that could be compared to stock that cost 60% less.
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      10-13-2023, 04:58 PM   #13
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I will weight mine when they show up. The options available for machining seem beneficial even if weight reduction isn’t a drastically haven’t a more aggressive pattern should be.
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      10-17-2023, 09:39 PM   #14
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We're probably better off reaching out to a rotor to see if they'll do a group buy
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      10-24-2023, 01:08 PM   #15
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Quote:
Originally Posted by CrashCade View Post
Yes sir. Mine should be here in 3 weeks or so.

https://www.tritonmotorsportsusa.com...ar-brake-discs
please post pictures and review when you install them. Let us know how the fitment is as well. I too was considering these.
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      10-25-2023, 04:15 PM   #16
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please post pictures and review when you install them. Let us know how the fitment is as well. I too was considering these.
+1

Would love to hear a review on these before pulling the trigger.
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      11-01-2023, 01:33 PM   #17
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Quote:
Originally Posted by 916_M5 View Post
please post pictures and review when you install them. Let us know how the fitment is as well. I too was considering these.
I called this company yesterday and was none too plussed on the voicemail I got hooked up with or the return call. Pretty expensive rotors. Let us know if they are functional and customer service/delivery experience.

Shawn
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      11-01-2023, 10:10 PM   #18
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Originally Posted by shawnhayes View Post
I called this company yesterday and was none too plussed on the voicemail I got hooked up with or the return call. Pretty expensive rotors. Let us know if they are functional and customer service/delivery experience.

Shawn
I tried to call as well with no luck. Hope another option appears this winter.
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      11-02-2023, 06:58 AM   #19
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Quote:
Originally Posted by shawnhayes View Post
I called this company yesterday and was none too plussed on the voicemail I got hooked up with or the return call. Pretty expensive rotors. Let us know if they are functional and customer service/delivery experience.

Shawn
I will shoot these guys an email and ask what that is all about. They definitely are not cheap. For the amount of money, you would hope customer service is at the top of the game.
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      11-02-2023, 07:09 AM   #20
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Originally Posted by CrashCade View Post
I will shoot these guys an email and ask what that is all about. They definitely are not cheap. For the amount of money, you would hope customer service is at the top of the game.
“The google account subscriber you are trying to reach is unavailable”

Sounded like somebody running parts out of their garage. Maybe so. And maybe they’re fine. The DID call me back. They DID leave a message. But first impression was not inspiring, especially when BMW OEM rotors, which work well on the street AND track are 1/2 of that. Not so much. I’ll wait until somebody else gets them and uses them.

Shawn
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      11-02-2023, 07:53 AM   #21
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Since Shawn tracks his car a lot and says stock steel or ceramic brakes both work well, the advantage of the more expensive true 2 piece rotors would be weight savings. Reducing unsprung weight does improve handling, but Shawn actually removed his light weight carbon rotors and installed much heavier steel ones and is not saying there is a significant difference.

The OP’s 2 piece aluminum hat and steel rotor ring combination is going to be closer in weight to stock steel rotors than to the factory option carbon rotors so even less of a performance benefit.
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      11-02-2023, 12:34 PM   #22
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Quote:
Originally Posted by pbonsalb View Post
Since Shawn tracks his car a lot and says stock steel or ceramic brakes both work well, the advantage of the more expensive true 2 piece rotors would be weight savings. Reducing unsprung weight does improve handling, but Shawn actually removed his light weight carbon rotors and installed much heavier steel ones and is not saying there is a significant difference.

The OP’s 2 piece aluminum hat and steel rotor ring combination is going to be closer in weight to stock steel rotors than to the factory option carbon rotors so even less of a performance benefit.
2 piece rotors have a lot of advantages. HOWEVER, the stock BMW ones are two piece as well (look closely. Just because YOU can't take them apart doesn't mean they aren't two piece). The carbons are just two damn expensive. If they cost what the steels cost, I'd use the carbons all the time. But $4000? per? vs. $400. No way. I just couldn't see that much of a difference. My GT-R I could see a little bit more.

HOWEVER, if this two piece rotor was from Brembo, or stoptech, or girodisc? In a heartbeat. I'd at least TRY it. Maybe end up going back to the BMW's.

Shawn
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