Eccentric Bottom Bracket

What is an Eccentric Bottom Bracket?

An Eccentric Bottom Bracket (EBB) is a device used to add tension to a bike chain or belt rather than a traditional deraulleur. A traditional bottom threads into the EBB in off center location, which allows tension to be increased or decreased by rotating the EBB clockwise or counterclockwise. When the appropriate tension is achieved, the EBB is held in place by expander bolts inside the unit.

What is the difference between an EBB and sliding drop outs?

The EBB adjusts chain tension at the bottom bracket, allowing the frame to have standard thru-axle dropouts or quick release dropouts.

What is the upcharge for an eccentric bottom bracket system?

$400. This price includes the shell and the internal expander system.