![ACS MainDrive Freewheel](http://demo-sfy.sniperfast.com/cdn/shop/products/acs-maindrive-web_69c79ead-2d04-4bf9-adc4-cb9f28703ded_{width}x.jpg?v=1575455240)
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.
Specs
- 16T
- 1/8” chain
- English threads, 1.37” x 24tpi
- 136g