wyre forest blues
Über Member
I appreciate there are previous posts on replacing internal gear cables. However on my Cannondale Synapses the cable runs internally in the downtube and the chainstay. At the service port on the bottom bracket the inner cable is protected from the elements by a thin outer plastic sheath, which appears to have an internal diameter just large enough to accommodate the inner cable Can someone advise the best way to thread the new cable in the downtube and through the plastic sheaf. Do I need to remove the crank arm spindle to access, or perhaps can the outer sheaf at the BB service port be removed and reinserted?