I want to run 140mm rear with 6 bolt so that doesn't exist for shimano. I figure the HS1 seems good enough. I have SLX Icetech brakes. This will be for a very small rider so heatup issues aren't a concern of mine. Just want to make sure general compatibility (as in no clearance issues) will exist. I have what looks like an avid 160F/140R post mount to IS adapter probably from an older fork that was IS. I planned to use this adapter on my post mount shimano calipers.