12T Freewheel sprocket

Grubee Inc


  • 12T Freewheel drive sprocket

  • This is a Service Replacement part for our discontinued 4G model 1C T-Belt transmission only.  Please do not order for any other purpose. 

  • 10mm dia. center hole with 3mm keyway. 

  • Use 415 and 1/2-3/8" bicycle chain 

  • Limited supply.   Sold only to registered owners of 4G 1C transmissions.    When gone no more will be available. 

  • Soak in Oil before installation.