Bicycle chain ring description Key features and benefits - Safe efficient design: built-in machining provides smooth operation and safety during use. Suitable for time cycling. Extended support with positive and negative tooth shapes improves chain engagement and performance. - Aluminium alloy construction: the narrow wide chainring uses a suitable aluminium alloy with a positive and negative tooth profile to help prevent the chain from falling during hard pedaling, offering reliable strength. - Wide compatibility: fits most 110/130 BCD cranks. Please verify your crank type and the desired number of teeth before purchasing to ensure proper fit. Compatibility and sizing - Fits most 110/130 BCD cranks. Please confirm your crank size and the number of teeth you need before purchasing. Sizes and tooth options - Size/BCD: 110/130 BCD - Splines (teeth options): 36T, 38T, 40T, 42T, 44T, 46T, 48T, 50T, 52T, 54T, 56T, 58T, 60T Use scenarios - Daily commuting: provides reliable chain retention on variable terrain and road conditions, reducing the risk of chain slip during urban riding. - Mountain or mixed terrain riding: the narrow wide tooth profile helps keep the chain engaged on bumpy surfaces and during shifts, improving drivetrain stability. - Performance upgrades: upgrade an existing 110/130 BCD crankset to a specific tooth count to achieve the desired gearing for terrain, fitness goals, or riding style. Notes - Before purchasing, please ensure your crank is compatible with 110/130 BCD and select the appropriate number of teeth for your riding needs.