Quote:
Originally Posted by feuer
This rotor is neither of those. BMW performance rotor 34216795755 is direct fit but those are slotted and dimpled. To my knowledge the aftermarket are same design. Additionally, all rear rotors for 160mm barking brake have stepped drum section. This rotor drum section is flat. Actually look a lot like front rotor, like e60 525i/530i front with is similar size 324x30 offset 77. Oeguy need to share the part number.
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feuer Do you think it’s a f30 328i rear rotor with the circumference turned down?
PN: 34206797598 (or the non dimpled equivalent) which is a 345mm x 24mm rotor that fits the e9x 328i 160mm parking brakes.
When I researched this swap I couldn’t find any other rotors that were a good fit as a starting point. The only issue for the OP would be machining them down that much throws off the balance. (Supposedly the discs are balanced by removing material from the outer edges when they are produced and if you do major machining like removing 20mm off the outer diameter you will throw the balance off.)
He said they had done some machining so that’s what I came up with. If you look at his pics of the rear rotors the inner vent parts look like they meet up flush with the OD and aren’t recessed below the OD like stock.
