We've run into a cabling challenge while building a new road bike. I am familiar with installing Shimano STI levers using downtube mounted cable adjusters. However, this frame does not accomodate the option of using downtune shifters. It only has bosses on the headtube for the derailleur cables.

The challenge is, once the cables are run to the derailleurs, they are in the direct path of the front Caliper Brake cable. Therefore, if I turn the front wheel, the front brake cable hits the derailleur cables.

I know plenty of the newer frames don't accomodate downtube shifters and use the bosses on the headtube. How do you overcome this cabling challenge? See Illustration.

Thanks in advance

Gosh dang! I have several with that same setup. Did not seem like an issue to me.

huh, never thought of that one...

thank you CAD, your pipe dream's come to life.

**********? What is that all about**********?

I think that they angle you turn the front wheel while riding will not be sufficient to cause a problem.

i mean it's something somebody Computer Assisted Designed with using Common Sense.

What caliper are you using? This is usually not a problem, esp. if you run enough housing to get a little curve left before it sweeps back right into the shifter.

Route the Front der cable to the right side of the bike, and the Rear der cable to the left side of the bike, crossing the cables to the correct side under the downtube. This should give you more clearance, and the cables will move out of the way when steering the bike. My Vitus Futural has shifter bosses that are very close to the head tube, and I have routed my cables that way and have no issues whatsoever.

It's a non-issue... similar to toe overlap. No affect while riding.
But I do like monogodo's cable routing idea.....