The hybrid toothed chain and sprockets incorporate features of a roller chain, half link chain and gear transmission. For power transmission, it has the advantages of a roller chain: simple, strong, reliable and light weight. The consistent pitch of half links decreases vibration and allows flexibility for bicycle sizes. The toothed profile engaging system on both chain and sprockets enhances efficiency and reduces the noise of the gear transmission. Consequently, this product is smoother and quieter with higher transmission efficiency, making the hybrid design the future of bicycle drive trains.