I'm thinking of converting my rear 140 flat mount brake to 160mm so I can use shimano SM-RT86 ice tech rotors front and rear. Is there an adapter for this conversion? My hubs require 6 bolt rotors or I'd pick one of the other ice tech rotors. The reason I'm looking at new rotors is that I'm getting a lot of noise and vibration after a long descent. I'm already running ice tech pads, but the rotors are simple SRAM steel.
Volsung's link is for a front adapter. You need a rear flat-to-flat 160mm. On the front, there's usually a plate that you just flip upside down to switch between 140 and 160. Check out the pictures of the different mounts at Competitive Cyclist. https://www.competitivecyclist.com/shimano-flat-mount-disc-brake-adapter
Grabbing one at your LBS is a pretty safe way to go about it.
