The EX1 drive train was designed specifically for the demands of electric-assist mountain bikes: a wide gear range with bigger jumps between gears and sturdy components to handle higher torque loads. Liberal use of features found on SRAMâ€™s high end MTB parts provide high value, quiet operation and ease of service.
Built for high torque E-MTB conditions
Use with Bosch-compatible or Direct Mount SRAM X-Sync chainrings (sold separately)
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