Happy to be corrected, but not sure there's a benefit to run full outers for internal routing as it'd be clunky as around the BB. You can run a liner (gear inner) and frames often come with them to help routing, or bare cables in the frame, and a section of liner on the front mech cable around the BB guide and frame exit hole to stop it rubbing excessively.
Happy to be corrected, but not sure there's a benefit to run full outers for internal routing as it'd be clunky as around the BB. You can run a liner (gear inner) and frames often come with them to help routing, or bare cables in the frame, and a section of liner on the front mech cable around the BB guide and frame exit hole to stop it rubbing excessively.