Features: Bike narrow wide chainring made of aluminum alloy, designed with positive and negative teeth to prevent chain drop, providing strong performance. Safe and efficient design: precision-machined for durability and strength, suitable for long-term cycling. Optimized tooth profile enhances chain engagement for improved performance. Compatible with 110/130 BCD cranks. Available sizes: 36T, 38T, 40T, 42T, 44T, 46T, 48T, 50T, 52T, 54T, 56T, 58T, 60T. Tooth thickness precision-machined to seamlessly interface with inner and outer chain links, reducing friction and noise. Please verify your crank's BCD and tooth count before purchase. Specifications: Material: Aluminum Alloy Color: As shown in picture Package Weight: approx. 110g Size: approx. 30cm / 11.81in Package Includes: 1 x Bike Chainring Note: Please allow 1–2 cm error due to manual measurement. The actual product color may vary slightly due to monitor display differences.