Alt Brake Hose Routing

[Fisan]

TL:DR: The brake hose gets caught between the frame and the bike rack claw, resulting in the hose rubbing unnecessarily. Would it be worth trying to reroute the hosing? Adhesive guides seems like an option...

I have an old'ish frame with external brakes/cables. There's no problem in itself, except when I travel with the bike: the rear brake hose gets caught between the downtube of the frame and the claw of the bike rack, resulting in the hose rubbing unnecessarily and causing wear to the cable and frame - see expertly drawn figure below

 

It got me thinking, could I not change the hose routing somehow? I could think of two options:

Option 1: Use existing derailleur routing

Solution: This frame was spec'ed with a front derailleur, with the cables running along the top tube and seat tube (cable guides at pts 1,2 and 3). Maybe I could somehow reuse those guides for the brake hose, and the finally link up with the existing brake guides on the chain stay.

Potential problems: bending radius of hose - especially close to the BB (PT4), there may not be enough clearance between the frame, tyre and what the bending radius allows. Also, the existing hose might be a bit short for this route.

 

 

Option 2:  Existing derailleur route + stick on guides

Solution: Jagwire has these adhesive backed housing/hose guides that you can attach to the frame (pts 3 and 4). Meaning I can make use of the existing guides (1 and 2) and new guides (3 and 4). The old hose guides will just be empty.

Problems: Not any serious ones I can think of. Some useless/empty guides on the frame. 🤷‍♂️

 

Option 3 is to eventually get a new frame where this will be a non-issue. But I'm not considering that as an option now.

Thoughts?

[ajnkzn]

If it's purely for travelling, just put an old sock between the frame and cable?

[Fisan]

3 hours ago, ajnkzn said:

If it's purely for travelling, just put an old sock between the frame and cable?

Man, I spent so much time drafting accurate diagrams, only to be told use a sock 😀

I definitely over-complicated this one. Time to close thread.

[RobynE 🚵‍♀️]

My current go-to is pieces of 10mm yoga mat. I have some random pieces and just jam them in where I need them. They’re less slippery than pool noodle and 💯 stay in place every time as long as they’re secured (in my case with straps, but the claw in your case). 

[ChrisF]

2 hours ago, Fisan said:

Man, I spent so much time drafting accurate diagrams, only to be told use a sock 😀

I definitely over-complicated this one. Time to close thread.

 

Hiehie ....

 

Some technical benefits to Option 2 (if you are happy with the stick on guides)

 

Option 4 ..... how much slack does your current line have ?  Should be enough to move some of the slack to the "clamp position", use this slack shift the cable to the side of the frame at this point.  Now use some of the clear frame protection strips to "strap" the cable in this position.  

 

No need to re-route and re-do the brake system.  And the clamp wont touch the brake hose ..... But wait, there is more .... Now your clamps goes onto a plastic layer which protects your frame.

 

 

 

Option 5 .... some very brave soul would drill a hole in the downtube and route the cable internally, exiting below the BB .....

 

 

ALL depending on the condition of the frame and your future plans for it.

[Mook]

18 hours ago, Fisan said:

Man, I spent so much time drafting accurate diagrams, only to be told use a sock 😀

I definitely over-complicated this one. Time to close thread.

Oh sock-it man 🤢

Cut off a piece of pool noodle and split down the length. Open the cut and fold over frame where the rubbing occurs. This has been my goto solution for more years than I can remember for my alloy, steel AND carbon frames.

Never damaged a frame or cable/hose ever since.

[love2fly]

23 hours ago, Fisan said:

Man, I spent so much time drafting accurate diagrams, only to be told use a sock 😀

I definitely over-complicated this one. Time to close thread.

When I used to use the old style bike racks that clamped my top tube I used to wrap a yellow Duster around the tube inside the break cables and once  OVER the cables. Never had a scratch even in carbon frames.

[droo]

https://www.thule.com/en-za/bike-rack/roof-bike-racks/thule-upride-_-599001

https://yakima.com/products/highroad

Grip the bike by the wheels, not the frame... problem solved.

[ichnusa]

If you use a pool noodle, sock, yoga mat or any other padding (or nothing for that matter), use a old style toe clip strap to secure and prevent bike unclipping itself...

I have seen a couple of bikes that have been dragged on the highway behind cars - not good

 

[Jensie]

Or try this