Sorry, this is currently sold out.

Click, click, grrrrrrr. Whether your bike’s a modern marvel or a cult classic, when it’s time to replace the freewheel, the ACS MainDrive will have you back to coasting contentedly in no time.


  • 16T
  • 1/8” chain
  • English threads, 1.37” x 24tpi
  • 136g

Shop all Freewheels

Shop all products tagged Drivetrain , Freewheels , Parts , Under $25

Free Shipping on all orders over $100