Derailleur hanger
The derailleur hanger has a predetermined breaking point to avoid
damage of the frame if the derailleur gets hit by an object. Propain
recommends to buy this spare part in advance to have a quick re-
placement in case of damage.
ISCG socket
The ISCG socket is welded directly onto the frame. You can easily
and without the use of adapters put a chain guide on your bike.
Internal cable routing
The cable for the front derailleur of your bike is routed through the
inside of the frame to secure it from rock strikes and dirt.
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