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Sram's EX1 is the first drivetrain system specially manufactured to meet the demands of electric MTBs: quiet operation, intuitive gear shifting, longer battery life, and increased endurance. Solid enough to withstand the high-intensity forces of electric MTBs, the EX1 chain ensures quiet operation across the entire gear range and transmits more power to the rear wheel. The EX1's improved chainline allows for a wider and stronger chain than drivetrains that were not specifically made for electric MTBs.