Shimano Flat Mount Disc Brake Adapter.

Whether youre in paradoxical possession of postmount brake calipers and a flatmount frame or just need to correct flattoflat mount adapter to fit your chosen rotor size, Shimano has a Flat Mount Disc Brake Adapter to get you up and running (and stoppingin a flash. Available in a variety of post/flat and flat/flat combinations to accommodate 140mm and/or 160mm rotors, this adapter installs quickly and ensures your calipers work seamlessly with that shiny new frame.