1-piece forged 7075 aluminum arm/spider design for optimized weight and strength
Optimized Q-factor for 68/73mm shells with a 51mm chainline and a drive-side integrated 24mm-steel (GXP) bottom bracket spindle for maximized stiffness
X-Glide chainring combination engineered with an 11t common-denominator enabling perfectly timed/placed shift-points
GXP (Giga X Pipe) cartridge bearing bottom bracket set sold separately: available in 68/73mm threaded or BB92 Press-Fit (either BlackBox ceramic or Team steel bearings)