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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Suspension | Chassis | Brakes > 2 piece rotors for 2/3/4 series (340X30 front rotor)
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      10-11-2021, 09:49 PM   #1
Rotorav8r
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2 piece rotors for 2/3/4 series (340X30 front rotor)

Hi Folks,

This rotor is used on a lot of cars as OEM. It is the 340 X 30 front rotor and can be found on variations of the following:

F20/F21/F22/F23/F30/F31/F32/F33/F34/F35/F36

In talking with Mike @ GiroDisc, there is opportunity to build this rotor as a drop in replacement in a 2 piece rotor with aluminum hat and cast iron curved vane disc. He wants to see some interest though.

I live in Washington about 2 hours away from their shop. I would be more than willing to drive up there so they could get any and every measurement they would need. I already have the drawing for the disc itself, but happy to do my part to make this happen.

Mike is looking for commitment from 10 people to buy a set to do the work.

My question: Who is interested in a 2 piece rotor design? Don't answer yes unless you are willing to buy. I want to be fair to Mike on this.

I'm assuming in the $800-1000 range looking at the other rotors they do.

So if you are interested, please PM me and put a comment in the post so others can see what interest there is.

Thanks.
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      10-11-2021, 10:09 PM   #2
Logicoeur
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Interesting. I had only found one place that made one in 340mm. Platz1 on eBay. Found them as an m4 thread purchesed a set in their OE size.

I am running them in the 340mm setup, fully floating.
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      10-12-2021, 03:50 PM   #3
Rotorav8r
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Wow! Good find...

I sent a note to the vendor to see if they make them without drilling. I have found that drilled rotors just don't hold up on the track.
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