[blau3er]

I recently bought a full set of F97 X3m brakes to sell on, however I thought it might be of use to share this info incase anyone is looking to go for a [relatively speaking] cheap BBK kit made entirely of OEM parts.

What you see here are a set of Brembo 4 pot calipers in 395mm variation with ///M compound brake pads of the ///M pin drive semi-floating discs.

I have a G20 hub as I have previously used it verify other brake fitment options, so I popped the calipers and discs on to see what was what. The good news is that its effectively a plug and play set up. It all lined up perfectly, with the calipers bolting down without any interference from the knuckle. The discs fit on the hub and there are no issues with alignment, except for the disc retaining screw, which must be different on the F97 hub.

Essentially this could be a pretty good set up for G series owners, as its not just the G20 that this would work on. M compound pads and discs coupled with the far superior looking 395mm caliper body is a winner!

Pics:



Pad sweep identical to OEM fitment on X3m.





The only known issue; brake disc retaining screw does not line up



Perfectly seated on G20 hub, no issues with CB or PCD alignment



Fitment detail





G20 hub for reference



Not much meat left on the hub to facilitate re-drill for disc retaining screw

[kyungmin1983]

Hello

I have prepare a similar tune as you did it.
In my case, I have x3m40i maybe same wheel hub with g20.

So I bought x3m f97 brake set(rotor, caliper, dustplate) and will try next month.

In this case I have a question, how did you drill extend retainer hole? Do you have a drilled hole data (center of hole location info, radious from center of rotor, whole diameter and so on.)?

Ps. If you have design file for modified hole location, could you share it?

Thanks

[jeegunkim]

Cool, but don't you have to also upgrade the brake booster andm aster cylinder for this to properly function as an upgrade?