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.

Key features

• World Cup level XC wheelset that balances precision handling with light weight and the durability to tackle todays technically challenging courses
• Only 1375g per wheelset
• IDM (Impact Dispersing Matrix) material in both front and rear rim for superior impact strength and industry leading durability
• Completely new light weight asymmetric rim design with a 30mm internal TSS channel for speed generating traction and control
• Ringle Super Bubba X hubs offer 4 degrees of engagement
• Lifetime Warranty

Specs

• Outer Rim Width - 35.5mm
• Internal Rim Width - 30mm
• Rim Depth: 21mm
• Rim Material: Carbon Fiber
• Rim Construction: Asymmetric profile, TSS channel, MR5 layup •Technology: Impact Dispersing Matrix (IDM)
• Rim Size: 29”
• Hub: Front Reynolds / Ringle SBX
• Spoke Type: Sapim CX-Delta
• Nipple: External Alloy
• Engagement: 4°
• Spoke Count: 24 Front, 28 Rear
• Brake Interface: Center Lock
• Freehub: Shimano Micro Spline, SRAM XD and Shimano HG available
• Wheelset Weight: 1405g (set)