- Application: MTB - Technologies: X-Sync 2, Boost - Compatible with XX1 Eagle, X01 Eagle, GX, NX, SX Eagle cranks - Direct mounting without chainring spider - 104 mm bolt circle variant is both Boost, and standard compatible - Gears: 12/11-speed - Material: Aluminum - Chainring options: 30T, 32T, 34T, 36T, 38T - Colors: gray - Offset: 3 mm (Boost), 0mm, -4 mm, 4 mm or 6 mm