The minimum centre distance is sometimes governed by the amount of chain lap on the driver sprocket, our normal recommendation in this circumstance being not less than six teeth in engagement with the chain.

• 最小中心距有时由驱动链轮轮齿与链条接触数量决定，在这种情况下我们通常建议有不少于6个的轮齿与链条啮合。