Fits most 110/130 BCD cranksets - Compatibility: Suitable for most 110/130 BCD cranksets. Before purchase, please verify your crank BCD and the desired tooth count specification to ensure proper fit. Aluminum narrow-wide design for secure chain retention - Construction: Made from aluminum alloy with a narrow-wide tooth profile. The alternating positive and negative widths help prevent chain drop and support strong power transfer on rough or demanding terrain. Available sizes and tooth counts - Size: 110/130 BCD - Teeth: 36T, 38T, 40T, 42T, 44T, 46T, 48T, 50T, 52T, 54T, 56T, 58T, 60T - This range allows you to tailor gearing to your riding style and crank specifications. Engineered for smooth operation - Tooth engagement: The tooth thickness is machined to work seamlessly with both inner and outer chain links, helping to reduce friction and noise and to match your riding demands. 2-3 practical use scenarios - Mountain biking and trail riding: Upgrade a 110/130 BCD crankset to improve chain retention on technical climbs and rough descents. - Gravel and cross-country riding: Replace a worn chainring to restore reliable shifting and maintain quiet operation on mixed surfaces. - Spare drivetrain setup: Suitable for riders with 110/130 BCD cranks who need an alternate gearing option that minimizes chain drop in dirty or muddy conditions.