SRAM's EX1 is the first transmission system specially designed for the specific demands of electric mountain bikes. With it, operation will be quieter, changes will be more intuitive, the battery will last longer and will resist wear better.
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This EX1 chain is strong enough to withstand the torque of electric MTBs. It has a design that guarantees silent operation throughout the entire gear range and perfectly transmits power to the rear wheel. The EX1's improved chain line allows you to use a wider, stronger chain than drivetrains that are not specifically designed for electric mountain bikes.