Shimano Alfine chain tensioner for singlespeed/gear hub - black

The Alfine is one of the best working chain tensioners on the market. This is due to its construction and functionality reminiscent of derailleurs. The attachment is also made to the derailleur hanger like with derailleurs.

• first choice for vertical dropouts and conversion to hub gears!
• 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