Forged/CNC machined 6066 aluminum arms with updated graphics Proprietary Cinch system removable spider can convert between existing chainring standards and Direct Mount spiderless rings, and even remain flexible to future developments Choose a spider or use a Race Face Direct Mount Narrow Wide ring (sold separately) BB sold separately, use RF2925 for English 68/73mm shell 650g (32T direct mount alloy, w/o BB)