(AM/FR) dual-ring + honeycomb reinforced bashguard with All-Mountain Compact gearing Hollow-forged, 2-tone aluminum arms with a reinforced spider and an integrated, HollowTech-II (HT2) bottom-bracket spindle for improved power transfer 4-arm 64/104mm BCD with aluminum middle / steel inner SG-X chainrings (middle ring has pins/ramps for precise shifting response) Included wide-stance bottom bracket cupset with outboard bearings offers increased rigidity (BB92 and BB30 adapter bearings available separately) Designed for a 46.8mm chainline and 135mm hub/frame spacing 995g with BB set and chainrings+guard @ 175mm