Damned internal routing. Best way to replace a rear brake hose?

[ishaw]

Fettling my son's bike today as it will get some use over the coming half term week.

Noticed the front brake had no pressure, so thought I'd bleed it but previous owner has rounded the bleed bolt on the lever. No problem, I was going to swap in some xt brakes anyway so that solves that brake.

However, the rear brake is internally routed and I didn't have the time to faff with that today so he's got odd brakes.

In preparation for when I get time to do the rear, What's the best way to do this.

I suspect from the front down as the hole to route it through is much smaller than by the BB.

I plan to tape the new hose to the old and pull through.

Would this be the right way to do it or am I best going from the bottom up?

Or is there a better way entirely?

 

[August Bicycles]

I usually do it with a short length of spoke, generally about 50mm of the centre section of a butted one.

Stick that in the end of the hose currently in the frame, then the other end in the new hose.

Try to push the old hose out with the new hose to avoid the old and new hose separating, you may have to gently pull the old hose whilst pushing the new hose through.

I don’t really worry about which direction I go from.

I’ve had to do this far too many times, this method has had good results for me.

Good luck!

 

[clubby]

The way to do it depends on your brake fittings. With ones where the hose is crimped to the fittings need done rear to front. Brakes with removable fittings at each end can be done either way. Also depends on the brakes you are removing. I’ve found with SRAM you need to pull through a spare hose with the old brakes and then fit the new hose the other way. I’ve a length of old hose for this task.

Also, treat yourself to one of these. Much more secure than taking hose together. Too much tape also makes it a ball ache to pull through tight spaces and small holes.
Much less likely to damage hose lining than using a spoke as well.


https://www.tweekscycles.com/rocksh...MIz5bduuHCkAMVTZVQBh2Pdi9WEAQYBSABEgLa9fD_BwE

 

[2manyoranges]

I usually do it with a short length of spoke, generally about 50mm of the centre section of a butted one.

Stick that in the end of the hose currently in the frame, then the other end in the new hose.

Try to push the old hose out with the new hose to avoid the old and new hose separating, you may have to gently pull the old hose whilst pushing the new hose through.

I don’t really worry about which direction I go from.

I’ve had to do this far too many times, this method has had good results for me.

Good luck!

Yep that's the way I do it - and have done it many times. You have to cut off the end section - about 2cms - which might have been damaged by the spoke but that's fine. And do it mainly by pushing hard on the hose going IN and very gently guiding out the hose which is coming OUT.