TTX Cable Change
Posted in Tech Talk, Tips by Oakes AmesHere’s a tip: Your Trek TTX uses a mighty long rear derailleur cable. At least mine did.
I installed new cables in my bike in preparation for IM Wisconsin. It seemed like a good idea after watching (from 4 bike lengths behind, of course) my training partner, John Wilson, big ring it all the way back from Hawi in last year’s Ironman after he notice his front derailleur cable had frayed almost to the point of breaking.
Replacing the front cable is easy, just thread it through starting at the shifter. I removed the metal plate just below the front derailleur, but you don’t have to. There is a pocket behing the plate and the cable housing tucks in there, pretty neat, so the cable end pops out of the hole.
I tried the same thing on the rear derailleur cable but no shiny cable came out of the housing. I thought I’d miss-threaded. Then I saw just the tip of the cable sticking out; the housing was just as long as the cable, and this was a 2000 mm length cable. I solved the problem by cutting off 2″ of housing near the rear derailleur, it looked as if I had enough extra slack. You can see that the one derailleur housing in the picture is shorter…it’s all one piece, just push it through until there is enough coming out of the rear chain stay for a nice smooth loop behind the rear derailleur.
I ride a size small TTX, if you’re on a large, check with the mechanics, I don’t know if a 2000 mm cable will reach. Now if I could only figure out how to drop my fork out, I could change the housing. I’ll check in with Doug, the team wrench, at the race site.

