53-11 wrote:7. Reverse the process and if you think that the RD cable housing is too long cut as well. Regarding the RD cable housing cut at the end closer to the front of the bike, only after removing the cable end cap though. You can get away with using something not as sharp on the derailuer cable housings but dont try using a blunt cable cutter on the brake cable housings or the cable itself. When making the cut, make it as swift as possible. Like what Bleve said the best tool for this job is the shimano one its blue in colour. The park tool one is also blue but a darker shade.
Think you may mean the reverse - sidecutters will work on brake housings, but for derailleur housings and all cables it is better to use a proper cable cutter, or sharp sidecutters. Derailleur housings have the tougher, longitudinal wire strands, rather than the coiled wire of the brake housing.