New e*spec Steel Direct Mount Bosch CX Gen4 Chainrings feature 53/55mm adjustable chainline with included spacer. They utilize e*thirteen's M3 narrow-wide tooth profile, which reduces weight and minimizes system wear and noise, without sacrificing chain retention. Steel rings provide great performance and long wear-life, at an affordable price.

Specifications:

• Color: Black
• Defined Color List: Black
• Designed for ebike: Yes