convert derailer cable routing

Kyle.B.H said:

I'm debating converting an old frame of mine from "top of chainstay"
derailer routing to "under the bottom bracket, bottom of chainstay" routing,
primarily because I'm having issues with the angle in which the front
derailer cable approaches my front derailer. Seems to me I need to do the
following:

Drill and tap an appropriatly sized (?) hole in the BB shell to accept a
cable guide. Any gotcha's?

I bet that you could get away with just double-stick taping a bottom
guide. Auto body places have some pretty amazing tapes these days, and
cable tension will keep it in place with a little start from tape.

Drilling and tapping the bb should be straightforward. Remove the
bottom bracket first, of course. I've used duct tape in other
situations to build a pocket to catch the metal filings.

Quoted message said:

Find a chainstay mounted cable stop - do these exist?

Thanks,

Kyle

I don't know if they are available new, but they were standard decades
ago. Find an older bike shop that deals in classic frames and they
will be able to get you one.

Kyle.B.H said:

I'm debating converting an old frame of mine from "top of chainstay"
derailer routing to "under the bottom bracket, bottom of chainstay"
routing, primarily because I'm having issues with the angle in which
the front derailer cable approaches my front derailer. Seems to me I
need to do the following:

Drill and tap an appropriatly sized (?) hole in the BB shell to
accept a cable guide. Any gotcha's?

Find a chainstay mounted cable stop - do these exist?

Thanks,

Kyle

You could simply glue the guide on, or drill and rivet it on with a pop
rivet. The latter what how one of mine was attached but when fitting a
cartridge BB whose diameter is much later than the original three piece BB I
had to file away the rivet on the inside of the BB shell to allow the BB to
be fed through properly. Much to my surprise the guide did not fall off and
remains in place. Another alternaive would be brazed on guide(s)

Quoted message said:

I'm debating converting an old frame of mine from "top of chainstay"
derailer routing to "under the bottom bracket, bottom of chainstay" routing,
primarily because I'm having issues with the angle in which the front
derailer cable approaches my front derailer.

What's the issue? It's presumably been working for a while. If you want to
change it you can just run the cables under the BB shell, no guide really
needed. And clamp on CS stops used to be quite common but you may have to find
an LBS that's been around a while to locate one today.
Phil Brown

"Phil Brown" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Quoted message said:

I'm debating converting an old frame of mine from "top of chainstay"
derailer routing to "under the bottom bracket, bottom of chainstay"

routing,

Quoted message said:

Quoted message said:

primarily because I'm having issues with the angle in which the front
derailer cable approaches my front derailer.

What's the issue? It's presumably been working for a while. If you want to
change it you can just run the cables under the BB shell, no guide really
needed.

Actually, it's a new installation, going from single ring to a double. I
suppose that no guide actually might work, although it seems easy enough to
epoxy one on there.

Kyle

Hi Kyle, I'm unsure about a cable stop, but I do know Brandord Bike
(And probably many others) carry the Campy Stainless steel Black
coated bottom bracket cable guide.

As another poster has mentioned 3-M double sided tape, which is easily
gotten at Wal-Mart in the auto section should hold the cable guide
well.

Or perhaps another option would be to apply a small dab of Clear RTV
Silicone Caulk to the bottom bracket, apply it with the frame upside
down, and let this set up for a few days before going any further with
assembly.

With the RTV, it will be a 100% waterproof bond, and once the silicone
is fully cured, that part ain't going anywhere! With just the right
amount of caulk, the bond should be virtually invisble, and to get it
off, you'd have to cut it off with a knife. Either of these solutions
may be a better choice than drilling/tapping a hole. Hope this helps
you, Mark

"Kyle.B.H" <[email hidden]> wrote in message news:<coWic.32915$GR.4231353@attbi_s01>...

Quoted message said:

I'm debating converting an old frame of mine from "top of chainstay"
derailer routing to "under the bottom bracket, bottom of chainstay" routing,
primarily because I'm having issues with the angle in which the front
derailer cable approaches my front derailer. Seems to me I need to do the
following:

Drill and tap an appropriatly sized (?) hole in the BB shell to accept a
cable guide. Any gotcha's?

Find a chainstay mounted cable stop - do these exist?

Thanks,

Kyle