[SonicBoom]

Originally Posted by Mark McM

On the Campagnolo disc brakes (including Ekar), the banjo is inside the brake lever, and the olive and barb are at the caliper. If the hose is in good shape, there's no reason that a rear hose couldn't be used on the front, with a new olive and barb.

Hydraulically, there's no reason not to put the banjo in the lever, but it does create a pain-in-the-butt when the hose is routed internal to both the frame and the handlebar. Normally, internally routed brake house is run into the frame by the caliper mounts and then out through the head tube. then when the handlebar is fitted, the hoses are run into the handlebar and out by the levers. But the non-removeable banjo on Campagnolo hoses won't fit through the routing holes on most handlebars, or the routing holes by the calipers. So the hoses have to first be routed through the handlebar, and then into the head tube out out of the frame/fork by the calipers - backwards of they way the frame designers originally intended. The pain is that the hoses are must be run through the frame while the handlebar is dangling by the hoses, and likely the electric shift wires also have to run while the handlebar is dangling by the hoses/wires. And if you are using mechanic shifting, now you've got a pair of cables & housings dangling between the frame and handlebar before you can finally install the stem and handlebars to the steerer. Doable, but a real pain.

Ah, since the banjo is not removable, I would indeed need a Campag hose or have the LBS go through the ordeal martl mentioned. The hose, including banjo, are all one piece, essentially.