The Box Cosine Narrow Wide Chainring is CNC-Machined from 7075-T6 Aluminum, which not only makes it strong, but also light weight and ultra-stiff.
• Narrow Wide tooth profiling ensures ultimate chain retention
• CNC-Machined from durable 7075-T6 Aluminum Alloy
• Lightweight and stiff
• Compatible for 9, 10 and 11 speed
• 104 BCD x 4-Bolt (30, 32, 34, 36, 38T)
• Designed & Made in USA
Brand: Box Components