Aluminum alloy chainring with CNC machining and anodized coating for a smooth surface, bright color, and durable corrosion resistance. Specifications - Teeth: 52T - Bolt circle diameter (BCD): 130 mm - Mount: square hole Key benefits - Strong and lightweight: aluminum alloy offers high strength with low weight for improved drivetrain efficiency. - Precise machining: CNC processing ensures accurate tooth geometry for reliable chain engagement. - Durable finish: anodized coating provides color stability and resistance to wear and corrosion. - Quiet, smooth operation: tight tolerances reduce chain rub and unwanted noise during riding. - Easy upgrade: designed for 52T performance on standard 130 mm BCD cranksets with square-hole mounting. Compatibility and use - Suitable for bikes that use a 52T chainring with 130 mm BCD and square-hole mounting. - Ideal for road bikes, classic restorations, and custom builds that require a 52T, 130 mm BCD chainring. Applications - Road bike upgrade to improve high-speed stability and sprint capability on flats. - Restoration or replacement on bikes with square-taper cranksets needing a 52T 130 mm BCD ring. - Custom builds for road, gravel, or commuter bikes that use standard 130 mm BCD cranksets and require a 52-tooth chainring.