[billeuph]

I'm a bit baffled by how to replace the rear derailleur cable. The cable broke under the bottom bracket and disappeared into the frame. I've pulled out the old cable and have been trying to run the new cable down the inside of the downtube, but I don't see any way to guide it well enough to come out the small hole at the bottom bracket.

Is there a trick to this? Any help would be appreciated. The nearest BMC dealer is a couple of states away,

Bill Anderson

 

[BMC Lover]

Rear derailler cable replacement

Feed your cable through lever etc etc.
Lay your BMC parallel to the ground ie tilt frame over 90" on the right hand side
Feed cable down the downtube and once it hits the bottom lift up and down a couple of times and it WILL feed through the hole at the bottom.
You may have to repeat a couple of times
It is important to lay bike parallel to avoid cable wrapping around the FD cable (inside downtube) and to get it to exit easily
Try it you'll be amazed how easy it is

 

[Peanya]

Welcome to the forums.
I also suggest using a thin piece of wire if you can get a hold of some, that way it's easier to get it to the bottom. After that, you just tape the cable to the wire and pull it through. This eliminates the chance of getting the cables crossed internally.
That is, if you're still having difficulty with the above mentioned suggestion.

 

[billeuph]

Feed your cable through lever etc etc.
Lay your BMC parallel to the ground ie tilt frame over 90" on the right hand side
Feed cable down the downtube and once it hits the bottom lift up and down a couple of times and it WILL feed through the hole at the bottom.
You may have to repeat a couple of times
It is important to lay bike parallel to avoid cable wrapping around the FD cable (inside downtube) and to get it to exit easily
Try it you'll be amazed how easy it is

BRILLIANT! Wow, was this easy. After spending an hour trying to push the cable down from the top with the bike upright, with no success, it took all of 5 minutes to do the job with the bike on its side. Thanks, BMC Lover. Great tip.

I couldn't quite get the cable to come out the hole on its own, but it was so close to the hole that I could reach it with a small piece of wire with a hook on the end and pull it out. Problem solved.

Bill Anderson