Giant TCR the factory routing of the gear shift cables is so wrong you need this mod

Do you often need to lubricate or replace your shift cables in your Giant TCR, and your gear shifting is slow? Modify your cable routing, forget about upgrading to an electronic groupset, and enjoy trouble-free riding. 00:05 Rear - Points of failure 00:28 Front - Points of failure 00:45 Front - How did it work before the upgrade? 00:55 Front - Why can't this work? 01:10 Rear - New cable housing routing 01:30 Front - New cable housing routing 01:50 Downtube entry - Susceptible to dirt/water ingress 02:11 Downtube entry - How to improve? 02:58 Front - Chainstay entry 03:21 Front - New cable housing 05:32 Rear - Chainstay exit connection 05:52 Rear - Chainstay exit adapter 07:08 Rear - New cable housing 10:53 Front - Derailleur input 15:10 Rear - New shift cable 17:37 Front - New shift cable 19:25 Why is it worth to modify cables? 19:30 What could potentially hold you back? This is not your typical service manual. Any modifications you make are at your own risk.