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Alignment
The alignment of the belt in a straight line is crucial to the smooth operation of any CDRIVE™ system. The important measurements of a CDRIVE™ system are shown in the diagram at the right. You will need a bottom bracket and 4 arm 104 mm bolt circle diameter crankset combination which provides you with a chainline which matches your chosen rear hub.
Chainline Targets
The following list is a list of chainline targets of some standard internally geared hubs:
Shimano Alfine/Nexus 8 46 mm
Shimano Nexus 7 43 mm
Shimano Inter 3 46.5 mm
SRAM S7 SRAM T3 48 mm
Sturmey Archer 3 48 mm
Sturmey Archer 5 45mm
Additional sprocket dimensions
Chainstay lengths
Gear ratios and gear inches
Component compatibility
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