I think they're pretty much gone from adult bikes but if you have a kid's bike to service you might be interested. I needed to replace a Shimano Revo shifter cable on my daughter's Hotrock and couldn't find any decent instructions with pics until I stumbled on Park Tool's repair blog. The link below details accessing just about every type of shifter cable. The Revo one is about halfway down. Also posting the main url for all repair topics. http://www.parktool.com/blog/repair-help/shift-levers-shifters Main repair page http://www.parktool.com/blog/repair-help
