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13
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Bottom Bracket eccentric
Your tandem’s has either, a standard 68mm English threaded BB eccentric, or a BB30 Eccentric
assembly (shown next page) depending on the model. Both eccentric types are available from
Cannondale. See Replacement Parts.
The purpose of an eccentric is to enable rotation of the crankset within the shell for the
adjustment of the timing chain, the chain that connect the front BB with the rear BB. The
timing chain must be of the correct length in order to set the tension with the eccentric. See the
Specifi cations section for timing chain length for your tandem. Timing chain tension adjustment
is explained on the following pages.
FIXING BOLT
13 Nm, 115.5 In Lbs
Loctite™ 242 (blue)
WASHER
WASHER
THREAD CAP
3 Nm, 26.5 In Lbs
Loctite™ 242 (blue)
dowel
slot
WEDGE
(Non-Drive Side)
WEDGE
(Drive Side)
CIRCLIP
BB30 BEARING
QC616/
KB6180/
ECCENTRIC BODY
A457/
BB30 BEARING
Apply bicycle bearing grease
circlip groove
CENTERING BOLT
FRONT BOTTOM BRACKET
KP317/
