[Jay5k]

I'm running the beyern ritz in 18s and I want to upgrade to the m performance brakes with the 370/345mm rotors.

Anyone know if they will fit?

[alexonahurry]

it's gone be a tight fit. 18" OEM is the minimum. Yours are aftermarket wheels and no one can give you a definite answer. You could just paint your front calipers blue and get a set of blue ones for the rear axle. Technically your front calipers are identical to the performance ones- They have just a lower mounting point and can only handle 340mm at the front.

https://www.bimmerworld.com/About-Us...-Sport-Brakes/

[smrtypants44]

Try and find a 6cyl car nearby with the blue brakes and test fit, I'm sure there are a bunch around SF.

[alexonahurry]

Originally Posted by smrtypants44

Try and find a 6cyl car nearby with the blue brakes and test fit, I'm sure there are a bunch around SF.

Pretty sure his 340i is a 6 cylinder with 340mm rotor just not with painted calipers - His grey 4 piston front caliper is 100% the same than the blue M Sport option .(not M Performance) The M Performance brake is technically identical with the blue M Sport but has a larger mount to take 370mm on the f3X series front. The blue M Performance rear is identical to the blue M Sport caliper that can be found in various F2X and F3X models as well as in the M2/M3/M4.

M3 - M Performance front calipers are identical. They have just different colors- you can even find 380/370 printed on the front calipers. these are the rotor sizes.

The M Performance calipers were not a factory option and 99.9% of the time you will only find the normal blue 340mm front /345mm rear version on a 6 cylinder model.
There was a " Track Package" option available that included the M Performance brakes but I assume that not many cars have that factory option fitted. That makes it almost impossible to test fit his wheels on other cars.
btw: no coding required on a 340i for upgrade from his 4 piston to 4 piston M Sport or 4 piston M Performance - just plug n play.
link from my earlier post is quite helpful and explains the whole brake F3X thing

It's a gamble if the aftermarket 18" wheels fit over the calipers - OEM wheels are no problem

[Jay5k]

Originally Posted by smrtypants44

Try and find a 6cyl car nearby with the blue brakes and test fit, I'm sure there are a bunch around SF.

I have a friend with an f80. I can put my wheel on his, but he has the 380mm rotor. But I think the calipers sit on the same position.

[smrtypants44]

Originally Posted by alexonahurry

The M Performance calipers were not a factory option and 99.9% of the time you will only find the normal blue 340mm front /345mm rear version on a 6 cylinder model.

Incorrect-In the US the blue brakes (msport) come in the following:

4cyl F3x- 340/345
F2x (including M240i/M235i)- 340/345
6cyl F3x- 370/345

So for a 6 cyl car theres no difference between "M perf" and "m Sport" in caliper or disc size, only different compound pads and drilled rotors. M perf is only really an upgrade for the "base" brake grey caliper 6cyl cars.

[alexonahurry]

Originally Posted by smrtypants44

Incorrect-In the US the blue brakes (msport) come in the following:

4cyl F3x- 340/345
F2x (including M240i/M235i)- 340/345
6cyl F3x- 370/345

So for a 6 cyl car theres no difference between "M perf" and "m Sport" in caliper or disc size, only different compound pads and drilled rotors. M perf is only really an upgrade for the "base" brake grey caliper 6cyl cars.

....everyday is a school day - thanks mate !

[NR28]

I know this is an old post but did you ever determine if the rims fit over the 370mm rotors and M Performance calipers?

[Jay5k]

Originally Posted by NR28

I know this is an old post but did you ever determine if the rims fit over the 370mm rotors and M Performance calipers?

No sorry, never upgraded the brakes.

[NR28]

I appreciate it. The stock 18’s do fit over the M Performance setup quite well but I got an opportunity to get a set of the Beyern Ritz at a really good price.