• 12 speed Record / Super Record chainring
• Surface treatment improves durability
• 145 BCD outer rings are specific to Record or Super Record, while 112 BCD inner rings are shared between the two groups
• 12 speed Record / Super Record chainring
• Surface treatment improves durability
• 145 BCD outer rings are specific to Record or Super Record, while 112 BCD inner rings are shared between the two groups