Reconsider your choice on this one.
- Familiarity: I've used it several times
I purchased this to use with my SRAM Red road derailleurs. Shimano gets a lot of accolades, in general, so how can you go wrong with this choice? Here are two possible issues: 1) The metal ferrule that goes at the cable entry to the rear derailleur has an 0-ring built into it. It is designed to keep dirt out of the cable housing, the exposed cable being close to the road. This o-ring fits the cable tightly, and really drags on the cable. If you just take the bare cable and run it through the ferrule, you can feel it buzz as it grips each winding of the cable, similar to taking your fingernail and running it along a wound acoustic guitar string. Not smooth at all, and hardly meeting the low friction objective of a new set of cables. 2) The polymer coating on the cable sounds like a great idea, but this coating seems quite delicate. Just the process of installing it had put little nicks in the coating which are visible as little "hairy" spikes of polymer sticking up from the cable surface. Yeow! I hope my cables last at least one full year (4-6 thousand miles). but I worry that such wearing polymer "hair" will build up and gum up the works inside the cable housing entry/exit points. A bike forum contained a moment that this is fine for a pro where the cables are changed often (every race???) but this is not appropriate for me.