I’m swapping some brakes from external routed frame to an internally routed one and likely to need to shorten hoses too.
So, in the interest of not having brake fluid dripping everywhere inside the frame whilst coaxing cables with all the obedience of a rabid dog….is it best to purge as much fluid from the lines first (was thinking just push a liad of air through the system) or just tissue and tape over the end whilst routing?
Or some other way?
Brakes are Deore. Didnt want to push air through as although it seems to be mainly slx upwards issue shimano seem to excel with the rogue air bubble and wandering bite point which these started with just before I removed them.
I use one of
You feed the wire through first using the magnet. The hose then goes into the rubber sleeve at the end of the wire which pulls it through the frame and also stops fluid from coming out.
These made internal routing infinitely easier.
I've used the same kit linked above on internally routed hose in a frame without channels for the hoses/cables - saved my sanity more than once and also avoided draining the caliper/hose completely.
However, the rubber sleeve thing won't fit through most channels inside the frame if yours is posh enough to have full channels inside, i.e. hose/cable not just rattling around inside the frame tubes - in those cases I drain the hose to prevent fluid drips inside the frame.
You could pop a match stick in end & cut off excess. Might need a trim down to fit not tried it myself
Or some other way?
Is it a new frame or are you taking brakes off?
If its got a hose in a double barb is my preferred method.
it would take some doing to make the hose leak significantly
leave the barb in and feed it through, you'll prob lose less than one drop, then cut it to length and refit
As long as one end is sealed the other won't leak - surface tension, pressure etc, think a straw with a finger over the end.
So, if you leave the lever or brake end connected and any bleed fittings closed you should be good- so long as you don't pull the lever if it's the lever end that's connected !
Thanks for the info. Might give that tool a go. Cheap enough. i hate internal routing so anything to make life easier.
The little red Reverb barbs are good cos they have a little hole you can hook to pull it through the frame hole.
