First of all, leaving off the rear brake bridges for bikes that have canti studs is just plain stupid .... dumb dumb dumb.
Before you go about anything John you gotta know if the post stays put without the hanger. If the post still slips you have either an irregularity in the seatpost or frame. Do measure with digital calipers. If the post stays put w/o the hanger, don't go filing the inside of the seapost clamp, just don't .... repeat ... repeat .... repeat. I would measure the thickness of the Nitto hanger and compare it to the gap. Filing "some" off is a slippery slope, you may be better getting a different one. As mentioned try either the Surly hanger or the Origin8 one. I use the Origin8 one on the front of one of my bikes and I found the brake works better having the hanger so close to the brake as opposed to way up at the headset. The rear is no different. -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/91b5eb5f-b168-4664-ba77-fd2119ee25f6%40googlegroups.com.