welchy wrote: ↑
Mon Nov 22, 2021 5:19 pm
Next question... has anybody got knowledge of cable routing on these.
I will be running a standard stem, I think mine is an earlier model if I'm correct so now internal routing. Potentially the rear brake cable is internal though?!
Any info on how people have routed these and if people are crossing F&R derailleur cables internally in the frame as Calnago mentioned earlier in the thread.
So, yes, the rear brake cable uses the top tube in-out. For the derailuers, you can choose the entrance but you cannot change the exits. So, you wouldn't run it for the purpose of crossing them inside the downtube but you would choose how you want the cables to be out front at the head tube area. What I mean is that it can work fine either way and this means they can enter on the same or opposite from the side they connect. I do prefer the "cross" style where the right shifter exits the bar and maintains that arc over to the left and around left side of head tube and naturally arcs into the left side port in the downtube. Opposite for left shifter.
Now inside they must "cross" in order to exit correctly from the bottom bracket shell. The FD of course exits to the exterior of the bike to come up to the FD and the right shifter cable which is pulling from the left upper downtube entrance port, has to "exit" the BB into the chainstay and then finally out of that at the rear.
Each of those will need a frame interface/stopper for the cable housing to rest against. The RD exit actually uses 2 pieces, a stubby wide barrel into which the housing ferrel with tubing lead will also sit and then the housing sits into that.
You need to watch a lot of youtube or get an experienced builder to show you or do it for you though. Little things need to happen like liner tubing, which is not cable "housing", needs to run from the chainstay and into the downtube so the cable isn't just grinding on the carbon frame interior. Similarly for the FD cable which needs the plastic tubing from outside, into, under the bb, and up a little into the downtube area. To keep water from building up inside that tubing, a small slit or hole can be made near it's natural drain bottom curve under the bb.