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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Big Brake Kit - brake bias query



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      08-29-2020, 05:23 PM   #1
hmmmkoi
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Big Brake Kit - brake bias query

Hi,

Looking to get some advice on a big brake kit.

I know what size I will be going for on the front - 356mm x 32mm.

My question is what size I should be going for on the rear?

My options are 330mm x 32mm OR 356mm x 32mm. The difference in cost is only £80.

My concern is if I were to go for the 356 on the front and rear, would it adversely affect my brake bias?

My car is an E92 330i. Stock brakes are (330mm Front & 336mm Rear).

Also, will I be required to upgrade the master cylinder to the M3 one?

Thanks in advance.
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      08-29-2020, 09:54 PM   #2
feuer
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Your post lacks so much relevant info.
It will depend on what you want to achieve. Rotors size and master cylinder are only two of many more variables: caliper piston size, pads size, pads compound, tire size, tire compound....
With out info on what calipers you would use nobody can’t tell you whether you need m3 master cylinder or not.
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      08-31-2020, 04:37 PM   #3
csquared013
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Thought about taking advantage of the yellow BMW performance setup? Those should just be a bolt bleed, and drive, way to get it done. I want it but I have an XI...
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      09-01-2020, 02:00 PM   #4
feuer
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So what if you have an Xi? Brakes are interchangeable.
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      09-06-2020, 04:39 PM   #5
csquared013
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don't have anyone to machine the rear caliper mounting brackets. For some reason the BMW performance upgrade only fits rear wheel drives. I've only seen one old post where someone pulled off a retrofit to xi.
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