Spurred on by some of its OEM customers, FSA has developed a new eccentric bottom bracket adapter that allows the use of singlespeed, belt, and internally geared hub drivetrains on frames with vertical dropouts and PressFit 30 bottom bracket shells.
The new eccentric adapter is very straightforward in design: the two adapter cups slip into the bottom bracket shell, two bolts tighten them down, and conventional external-type threaded bearing cups are then threaded in. Loosening the bolts allows for easy rotation in the shell to adjust the tension of the belt or chain.
Retail price for the press-fit eccentric will be US$100.