Shimano Alfine chain tensioner for singlespeed/shift hub - silver
The Alfine is one of the best working chain tensioners on the market. This is due to the construction and operation reminiscent of rear derailleurs. The attachment is also made like the rear derailleur on the derailleur hanger.
- first choice for vertical dropouts and conversion to a rear derailleur hub!
- compatible with all 4/5/6/7/8/9/10-speed chains.
- not compatible with wide 1/8'' chains
- largest sprocket: 20 teeth
- smallest sprocket: 18 teeth