1.1 G (Single Speed): single-ring setup with aluminum bashguard. 1-piece forged 7050-T6 aluminum arms with drive-side integrated CrMo GXP bottom bracket spindle for 50mm chainline. GXP (Giga X Pipe): external cup, sealed bearing bottom bracket for 68/73mm shells (GXP-Team bearing cups included). 4-arm, 9/10sp compatible 7075-T6 blast-black aluminum chainring, 3mm thick 5182 aluminum guard, steel chainring bolts, and alloy M15 self-extractor crank/BB bolt. 848g (with BB).