Canyon Ultimate Rear Brake Hose Replacement

Great to hear and thanks for reporting back

Use a gear cable inner taped tightly to your old hose. Pull the hose out, which puts the gear cable inner in the correct path inside the frame. Attach your new hose to the cable inner after removing the old one and pull it back the other way. As for the cable tie in the middle, do as suggested above if you can, or alternatively wrap a piece of foam packing around the hose (through the bottom bracket opening), secure it with a couple of cable ties pulled up tight and pull the hose through to the correct position with the foam packing in the down tube to prevent noise.

I have just done this on my new build - only difference was I didn’t have an old hose to pull out! I did similar with the di2 cables and junction box in the frame - wrapped and cable tied before being pushed up into the frame to prevent rattling.

Hope this helps.

PP

Jagwire makes hose cutting tools that are very good. Its barb insertion tool is also highly recommended.

Shimano makes a tool to do both but it's £100. The Jagwire tools together are about £30.

Yep. And I thoroughly recommend it versus doing it yourself with a knife!

You can buy a small plastic tool for cutting the hose that guarantees a clean, 90 degree cut. Just Google bike hose cutting tool and you'll find it.

I suspect another way of doing it would be to 1) with the crankset removed, remove the hose and the cable tie and put in a new cable tie completely loose 2) remove the little cable tie plug 3)  with the bike upside down and downtube parallel to the floor - thread something like a brake inner through the headset end and along the downtube until you can see it through the cable tie port 4) hook the tie around it with the plug  5) keep threading the now-captive inner down to the bottom bracket 6) pull the inner out of the bottom bracket and tape some thread to it 7) push it back in and keep pushing until it's near the rear brake 8) put a vacuum hose on the rear exit and suck through the thread 9) pull the inner through 10) attach the hose to the inner 11) pull all the way through. The framesets (if you buy the frameset on its own) come like this; you attach the hoses to pre-inserted brake cable inners and pull through.

It's straightforward if you're willing to sacrifice the cable tie (and deal with the swearing and anger that follows trying fit a new one). 1) remove the rubber bits that go into the frame 2) release the old hose at both ends 3) very throughly clean all the oil off the outside or you won't be able to 4) tape the end of the old hose to the end of the new one 5) pull it through. It helps if you get the the two hoses inline as opposed to overlapping so try sticking something metal like a gear cable a few cm down each end prior to taping them together. If they separate, it'll be string+hoover time. No big deal.

Be VERY careful when cutting the hoses; the cuts have to be perpendular with clean holes... the tiniest amount of crap or restriction will stop the brakes working properly. You can do it with a Stanley knife if you're super careful and the blade is new. Make sure you get the olives and the interts too and make sure they are the right ones for your hose dimensions... And make sure the hose is the right one for your callipers and levers.

Good luck!