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Chain Length
When building a GEMINITM frameset into a bike, or when you need to replace your
chain, there are two methods to determine the correct chain length for a GEMINITM:
METHOD 1
Position the chain on the largest front chain ring, the largest rear cog, and
through the rear derailleur (with the cage at a 45° angle). Measure the chain
length required and add two full links more to the length.
METHOD 2
Remove the rear shock to simulate full compression of the suspension. With
the chain on the big front chain ring, the big rear cog, and through the rear
derailleur (with the cage at a 45° angle), measure the chain length. Use the
actual chain length measured.
WARNING
Riding with the wrong chain length (one that is too short or too long) may
damage the chain, rear derailleur, derailleur hanger, swingarm, and/or other
drivetrain components, and may cause a crash, possibly resulting in injury or
death. Make sure chain length is correct. Consult with your Cannondale Dealer.
Chain Retention Devices
Chain retention devices conforming to the International Standard Chain Guide
(ISCG) standard can be mounted on to the Gemini (all models). However, due
to variances in design within the ISCG standard and component quality, some
"compatible" devices may fit and work better than others. For that reason, we
recommend that you run the rear suspension through its complete range of
travel when checking the device for interference. As always, its a great idea to
consult with your Cannondale Dealer about compatibility before deciding on any
component for your bike.
