Cleanest way to pull hydraulic hoses on an internally routed frame?

[EB]

For a brake swap where you aren’t going to reuse the old hoses (or can’t because the old and new systems are incompatible), what’s the cleanest way to pull the old hoses before routing the new ones and avoid hydraulic oil dripping inside your frame?

I’ve heard some folks just cut the old hose and insert a wooden toothpick to prevent drip before pulling the hose, but that doesn’t seem too foolproof, especially since the toothpick may not be able to navigate the internal routing if it’s tube-in-tube. I’ve also heard of plastic plugs that you can get for barbs, so you can cut the hose, insert a sacrificial barb in the old hose, plug the barb, and then pull the hose. But not sure what to look for online to buy such a thing.

Any other ideas? Thank you all!

[prototoast]

Buy this part: https://www.jensonusa.com/Rockshox-R...Barb-Connector

Thread one end into the old hose, the other end into the new hose, pull the old hose out and it brings the new one right through the frame.

[Dave]

12 gauge copper wire is a tight fit. No leaks.

[tootall]

Proto’s part seems like the way. Short of waiting on that to arrive I’d try using some compressed air to push the old fluid out into an open jug before pulling it out.

[cmbicycles]

I'm all for buying tools, but why wouldn't a toothpick be able to navigate thru the frame? Stick it in, cut or break it flush, and pull out the hose.

[45K10]

I just swapped out the rear brake, including the hose, on my internally routed MTB frame the other day.

I just put a piece of silicone tubing over the hose and sucked all of the fluid out with a syringe.

[Kyle h]

I’ve used this with good result. There is a threaded plug like posted above that will stop the flow or you can use the black sleeve that sits over the hose and makes a decent seal.

https://a.co/d/cSZ8iAL

[Kyle h]

Originally Posted by prototoast

Buy this part: https://www.jensonusa.com/Rockshox-R...Barb-Connector

Thread one end into the old hose, the other end into the new hose, pull the old hose out and it brings the new one right through the frame.

Wow that’s cool, definitely gonna grab one of those, thanks for sharing!

[Gabe77]

The sharp end fits into the hose opening - shove it in there good, then just pull spoke out with hose attached. This worked OK for me but I was threading unused new hose - not full of hydroil.

[benb]

That Rock Shox reverb double ended barb is the bees knees.

It was recommended to me last year and it made the job super super easy.

I had also bought the Park routing kit. I kept the park kit because I will use it at some point for mechanical cables but the Reverb barb works so well I haven’t even opened the Park kit.

[StressStrain]

I've only done this once, so I'm no expert....

When I ran my rear brake hose through my Hakka frame, I cut the hose at the shifter and pushed the hose from the rear of the frame to the front. I left the cut end open and amazingly no fluid came out.

Was I lucky?

[Spoker]

What is the problem with a little oil inside the frame? The opposite of corrosive.

[prototoast]

Originally Posted by Spoker

What is the problem with a little oil inside the frame? The opposite of corrosive.

Not if it's DOT fluid.

[commonguy001]

I have this kit and never had a mess afterwards.
https://www.amazon.com/BESNIN-Bicycl...8QAvD_BwE&th=1

[John H.]

I just used that little red SRAM tool the other day- Worked great.