front derailleur cable rubs against bulky weld behind bottom bracket shell ...

Perhaps the BB guide is mounted backwards?

-Or-

If not, perhaps the screw for the guide is too far forward. If so, unscrew, rotate the guide in the
x-y plane towards the rear until the right clearance for the cables is obtained. Drill a pilot hole,
tap for the screw, then fasten.

"mark freedman" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Aluminium frame, TIG welds (very bulky). The plastic cable guide is present but does not extend
far enough to stop the cable from rubbing against the weld at the back of the shell. There's no
slot in the metal or other means of locating and stabilizing the cable - it slips sideways when
shifting.

I'm mostly concerned about the cable sawing into the metal, as well as the shifting
considerations.

I'm considering
1) a short length of cable housing (how long would this last ?)
2) durable plastic film, e.g. the kind used to protect chainstays
3) glue (?) another nylon cable guide to the back of the bb shell
4) glue some other material to protect the shell.
5) suggestions ?

I noticed this after I had the LBS eliminate the crossover under the teardrop downtube. The
cables were crossed where the third water bottle would mount (that can't be right?) and rubbed
the downtube (that can't be right ?). I looked at other Mikado touring bikes, non of them had
crossed cables.

I doubt it's related - I don't see how crossing the cables
would change how the cable bends around the back of the bb shell.

Thanks for your help.

"mark freedman" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Aluminium frame, TIG welds (very bulky). The plastic cable guide is present but does not extend
far enough to stop the cable from rubbing against the weld at the back of the shell. There's no
slot in the metal or other means of locating and stabilizing the cable - it slips sideways when
shifting.

I'm mostly concerned about the cable sawing into the metal, as well as the shifting
considerations.

I'm considering
1) a short length of cable housing (how long would this last ?)
2) durable plastic film, e.g. the kind used to protect chainstays
3) glue (?) another nylon cable guide to the back of the bb shell
4) glue some other material to protect the shell.
5) suggestions ?

I noticed this after I had the LBS eliminate the crossover under the teardrop downtube. The
cables were crossed where the third water bottle would mount (that can't be right?) and rubbed
the downtube (that can't be right ?). I looked at other Mikado touring bikes, non of them had
crossed cables.

The crossover makes for a nicer run for the shifter housing. Less rubbing on the HT. Some bikes it
works, some it doesn't, depends on where the bosses are mounted. My C-dale mtn bike was always run
this way with no problems, but my road bikes are not.

Quoted message said:

I doubt it's related - I don't see how crossing the cables
would change how the cable bends around the back of the bb shell.

Thanks for your help.

(mark freedman) said:

Aluminium frame, TIG welds (very bulky). The plastic cable guide is present but does not extend far
enough to stop the cable from rubbing against the weld at the back of the shell. There's no slot in
the metal or other means of locating and stabilizing the cable - it slips sideways when shifting.

I'm mostly concerned about the cable sawing into the metal, as well as the shifting
considerations.

I'm considering
1) a short length of cable housing (how long would this last ?)

Probably as long as the inner housing in the rest of your derailleur cables. Easily the
best solution.

Quoted message said:

2) durable plastic film, e.g. the kind used to protect chainstays
3) glue (?) another nylon cable guide to the back of the bb shell
4) glue some other material to protect the shell.
5) suggestions ?

I noticed this after I had the LBS eliminate the crossover under the teardrop downtube. The
cables were crossed where the third water bottle would mount (that can't be right?) and rubbed
the downtube (that can't be right ?). I looked at other Mikado touring bikes, non of them had
crossed cables.

That's pretty much a "style thing". On most bikes, the crossed cables won't touch anything.

Mark Hickey Habanero Cycles habcycles.comhabcycles.comOpen ↗ Home of the $695 ti frame