The chain is in charge of transferring power applied to the pedals to the rear wheel drive. Chains must not only withstand all kinds of weather conditions, they must also be strong enough to support constant strain. E-bike chains might be slightly more durable than normal chains, but they don’t differ much since the amount of force exerted on the chain is the same whether from a pedal or motor. High-strength materials and modern design means chain links today last a long time. Chains generally need replacing after 1200-2400 miles. When buying the chain, it’s important to make sure that the chain fits the number of gears used on the rear wheel. This ensures its compatibility with other components.