The X0 AM BB30's unidirectional carbon fiber arms are mated to a 4-arm spider. They have insert-molded aluminum pedal insert reinforcements, 2 chainrings, a bash and a 30mm bottom bracket spindle. What does all that mean? It means you're ready for what ever that mountain throws at you.
Taper-machined, hard-anodized 7075-T6 aluminum rings with optimized X-Glide shift pins/ramps