SRAM X-Sync EX1 Sprocket Chainring for Bosch Motors 18T Straight Steel Model-Dropout 636 converts to 12x148mm end cap

converts to 12x148mm end cap kit hub model rear: Torch mtn (IS)

Direct power transfer - the direct binding-to-ski connection provides great stability

try using a chainguide or chainkeeper in addition to a clutch-type rear derailleur

Featuring new Super Gravity technology to make it lighter it is still extremely sidewall-stable and snake-bite resistant

SRAM X-Sync EX1 Sprocket Chainring for Bosch Motors 18T Straight Steel Model-Dropout 636 converts to 12x148mm end capSRAM X Sync EX1 Sprocket Chainring for Bosch Motors 18T Straight Steel. 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 SRAMs high end MTB parts provide high value quiet operation and ease of service. X Sync (wide narrow) tooth profiles for great chain management