Hi. My rear shift cable goes through the chain stay. It looks like there is a plastic sleeve that goes the entire length of the tube because I was able to thread a new cable through with no problem. My derailleur shifts to smaller gears very slowly, so I was wondering, how do I replace the internal cable housing thing? Does that thing have a name? Thanks.
housing ends reamed and capped properly? rear housing loop length? the stock length will be short. what components? it would be called and internal cable guide or something similar. probably need to contact the frame manufacture. hanger alignment should also be checked and maybe a little less tension will help
'''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Is this an older Trek frame? If so, there is no internal sleeve but a funnel at the exit end of the chainstay that guides the cable end to the hole which is why you had no problems installing it. It can't be changed.
There are some crucial considerations to observe when fitting cables.
1. When cutting housing, make sure the hole hasn't been flattened, and use something sharp to ensure the crushed lining is opened up to a flare.
2. Housing ends need to be ground flat, preferably with ferrules fitted.
3. Housing length matters a lot - you need to determine the length that maximises the radius of all bends. Many bikes have a loop at the derailleur that's too short.