- Engineered tooth thickness to mesh seamlessly with both the inner and outer chain links, reducing friction and noise for smoother riding. - Narrow-wide aluminum alloy chainring with alternating positive and negative tooth shapes to help prevent chain drop and provide strong power transfer. - Compatible with most 110/130 BCD cranks. Please confirm your crank and tooth count specifications before purchasing. - Safe and efficient design with integrated machining for durability; suitable for time-trial riding. Plus and minus tooth profiles extend the chain engagement for improved performance. - Materials and compatibility: aluminum alloy; fits 110/130 BCD cranks; available in configurations that use plus or minus tooth shapes to enhance engagement. - Performance benefits: smoother pedaling, lower drivetrain noise, improved chain retention, and reliable power transfer on varying terrains. - Use scenarios: - Daily road riding and commuting where quiet operation and consistent shifting are valued. - Mountain or mixed terrain climbs where higher chain retention and stability are important. - Time-trial or performance-oriented rides where reliable chain engagement is critical.