Is there a stem and steer tube combination to allow through routing of cables?

[echappist]

A bit of an esoteric question. On my TT bike (Scott Plasma 3), the rear brake housing and Di2 cables enter the stem, with the Di2 cable merging into one single Di2 wire, and that single wireand the rear brake housing traverse the interior of the stem as well as the steer tube (via front and back apertures in the steer tube), and finally travels all the way along the down tube before emerging near the BB.

It's a very clean aesthetic, albeit one that's a total PITA to wrench.

Both the stem and fork are proprietary. I heard that PRO stems apparently allows one to run cables through the stem, but is there any that allows the cable to run through the steer tube?

This is somewhat related to my prior inquiry re: drilling my Ti frame to allow Di2 to run internally to the down tube. Any response is appreciated.

Thank you

[prototoast]

No aftermarket carbon forks (Enve, Columbus, etc) are designed to be modified to allow cables to pass through, so it doesn't really matter if you get cables through the stem. At least a handful of steel builders have made something like you're describing with a steel fork.

If you want something in carbon, you're going to need to get the fork/bars/stem from a proprietary system, and then design or retrofit a frame to take cables from the fork. These things can't work in isolation, which is why all the systems are proprietary. There's no plug-and-play front end you can stick on to update any old frame to a hidden cable setup.

[FlashUNC]

Doesn't solve your brake cable question, but eTap removes the question of the shift wires.

[joosttx]

Magura MTB does it...

https://www.magura.com/en/magura-integration-series/

[echappist]

Originally Posted by prototoast

No aftermarket carbon forks (Enve, Columbus, etc) are designed to be modified to allow cables to pass through, so it doesn't really matter if you get cables through the stem. At least a handful of steel builders have made something like you're describing with a steel fork.

If you want something in carbon, you're going to need to get the fork/bars/stem from a proprietary system, and then design or retrofit a frame to take cables from the fork. These things can't work in isolation, which is why all the systems are proprietary. There's no plug-and-play front end you can stick on to update any old frame to a hidden cable setup.

Thanks; it’s as i thought then. In retrospect, what Scott did back in 2009 was quite radical

Originally Posted by FlashUNC

Doesn't solve your brake cable question, but eTap removes the question of the shift wires.

Not interested in Sram, after having so many items crap out on me (and their customer support refusing to do anything about it. Not to mention it is not intuitive at all

Originally Posted by joosttx

Magura MTB does it...

https://www.magura.com/en/magura-integration-series/

If only they could do it for road...

[jtbadge]

it should go without saying that MTB suspension fork steer tubes in question are made of steel. Hard pass on drilling some holes in my carbon steer tube.

[echappist]

Of course, but i was inquiring about pre-formed (as was the case on my TT bike)