I have read that it is possible but for the life of me I cannot figure out how to do this.There are 3 holes, but all 3 of them seem to be guiding down to the cable guides down by the bottom bracket. For the brake cable to route to the top tube exit point, it seems that it needs to make an impossible loop inside the frame…
Has anyone done this routing and can share a picture of how it worked? I’d be willing to compensate you. Thanks!
You can loop it inside the frame. I have Di2, so it’s not space where the cables enter the frame isn’t a big deal. Routing the housing and cable takes a little trial and patience. I actually found routing the cable to be the hard part. Pretty cool once you get it done though!
Hi!
How do you guide the cable back in the top tube? The loop has to go down all the way to the top section of the down tube I’d guess?
Thanks!
I took off the fork to help route it. If you do some searching here on ST, you should find a diagram someone made. Good luck!
I took off the fork to help route it. If you do some searching here on ST, you should find a diagram someone made. Good luck!
bingo. do it with the fork and bearings out to make your life easier. otherwise it’s impossible. run it into middle hole in top tube, out of bottom crown. leave whatever amount you think is necessary between top tube entry and handlebar (it will be difficult to manipulate this length when you put fork back in). grab end of housing (btw, i’d do this with cable already in housing as well, fyi), push back up into bottom crown and into top tube. run backwards, grab out of rear brake exit hole, pull to remove slack.
There was a Cervelo tech that mentioned that the small black cup that the cables run through is just plastic and served no structural purpose. I used a dremel tool to make a hole in the back of the cup so brake cable had a more direct path to the rear of the top tube. I tried looping the cable as others are speaking of and braking wasn’t nearly as crisp as dremeling the rear of the cup. My $.02
Fyi, if you dremel or drill a hole in the carbon fiber cable “cup”, be sure to wear a respirator during the procedure.
It is not carbon fiber. It is plastic.
Edit: at least my 2014 P3 was plastic. Not sure if they started making them with carbon fiber on newer models.
My 2011 is carbon fiber. Yes, the exterior cable “cap”/guide is plastic, but the inner cup is part of the frame, so it is carbon composite (at least on my 2011 n.P3) …
it sure looks like it is carbon fiber on my 2014 NP3
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I can’t see any fibers in mine. I used a dremel sanding drum and you can still see a bit of a melted “burrâ€. This is really hard to see and I apologize.
It was plastic on my 2014 NP2…then again it’s an NP2…not the NP3.
2014 p3 is plastic
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Ohhhh, I see now. Yes it is plastic insert for sure. Like the one in the picture i attached, right? I am assuming that it simply seals off the top tube.
What kind of dremel bit did you use? Did you work on it with the fork off? How large of an opening did you make?
Thanks again!!
Did the pic post? I can’t see it in my feed…I used one of the small sanding drums/sanding barrel. I went in at a slight angle resulting in an elliptical shape. It was enough for there to be a bit of wiggle room. This helped my braking tremendously. I ran housing all the way to the plastic grommet. Not having the cable flapping around on the left side was worth it for me. GL
I popped out my plastic cable port and used a ~1" cut wheel to create an opening in the bottom-back of the cable port. I removed the fork to help guide the brake hose along the top tube. Cervelo also makes brake cable stops that allow you to pass full length cable housing through the frame (typically for hydraulic hose, but will work with any housing).
Here it is - I draw a red circle around the area that I am planning to make a hole through. Does this look right?
I made my hole in the middle but off-center towards the left makes sense. That should give you a cleaner line to the top tube grommet.
Got it. Alright, I’ll work on in the few days and will take detailed pics.
Thank you for your guidance!
I see. So you replaced the stock cable stop on the top tube with this cable stop and ran the brake cable housing all the way to the rear brake?