Ready for serious XC racing, the Blacklabel 309 XC Expert delivers a complete package of lightweight carbon performance and long-haul durability. Built around the same asymmetric rim profile and MR5 carbon layup used across the 309 XC family, it offers the perfect blend of vertical compliance, responsive handling, and trusted impact resistance. The Ringle Super Bubba X hubs feature fully CNC-machined internals and a fast 4° engagement, giving you the quick response and reliable power transfer needed for aggressive XC efforts. Whether you're battling for position or grinding out big training blocks, the 309 XC Expert is engineered to keep pushing forward.