The Chain Keeper BB attaches to bike
frames with outboard bottom brackets, and is designed to be used with
full suspension frames, carbon fiber frames and frames with non-standard
The Chain Keeper BB mounts between the
external bottom bracket and the bicycle frame, and has a sliding arm for
The Chain Keeper BB accommodates a range
of chain-line measurements and chainrings from 28 to 39 teeth.
This table lists the spacer arrangement for most outboard bottom
brackets when installed in either 68mm or 73mm shells.
Hollowtech II, MegaExo and Giga-X-Pipe bottom brackets are designed to
have their bearing cups spaced 75.5mm apart. The bottom bracket shell,
2.5mm spacers, and Chain Keeper BB mounting plate are counted towards
this total width.
BB Shell Width
Chain Keeper BB & 2.5mm spacer
Chain Keeper BB only
Note: This is not designed for
downhill/freeride/big hit use.
For more information on mounting and compatibility,
visit the Paul Components website.
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