I’m building up my wife’s new Ventum One and with Campy standard brake cable housing I get some friction (drag), causing the rear brake (TRP T851) to stick slightly (not completely, but enough that it doesn’t return to fully open).
This is by FAR not my first bike I’m working on… (have built probably 30+ bikes in my 20 years of wrenching for us and friends)… but it’s the first time I can’t eliminate brake drag by cable housing length and using good cables and housing.
Her bike is completely built with Campy SR EPS, Campy cables and housing.
Is there any cable housing that’s better for tight turns (required as the cables go thru the bars and stem)? Any other suggestions?
Except for this minor snag, the build went really well (the v2 battery fits nicely in the frame). There’s really only 3 things that I had to think about a bit. The standard exit port for the rear derailleur is not big enough for the connector to go thru, but thankfully, Ventum does supply an alternative exit port that’s much larger, so adding a rubber grommet to that and you have a perfect EPS exit port. There’s no good place to add the v2 charge port, but if you use the charge cable extension, you can put it right behind the stem, through the rubber grommet where the EPS communication cable and the rear brake cable enters. The hole for the front derailleur cable is not large enough to get the EPS connector through, but one minute with a fine file and the hole is now 1mm larger (didn’t need much).
All in all, can’t wait for her to race the bike year!
Segmented housing like Nokon works well on tight bends.
Segmented housing like Nokon works well on tight bends.
Agree. I like the new Jagwire stuff, it is a bit easier to install than the Nokon kit because the segments don’t slide off the inner. I’ve got it bending all kinds of different ways through my tririg stem and it works well. Most impressive is the really tight bend that you can just make out here into the stem’s integrated cable stop for the centre-pull front brake, that is a proper tight little turn inside the stem.
ETA: it is probably worth mentioning that these segmented housing options are compressionless, which can take some of the squish out of the brake system.
This is so nice. I have the same setup as you - P3 drilled, and you’ve just inspired me. It works “ok” as-is, but I’ll definitely be doing this next time I recable it.
This is so nice. I have the same setup as you - P3 drilled, and you’ve just inspired me. It works “ok” as-is, but I’ll definitely be doing this next time I recable it.
Nick - the great thing is that using segmented with a drilled P3 simplifies it a lot. I posted about it over here on the original P2/P3 thread, all you have to do is allow some extra liner beyond where the segmented housing ends, and make the hole in the end stop a tiny bit bigger to pass the liner through. Piece of cake!
Thanks for the help! I was considering using Nokon, but I hate to work with that internal in the frame (I do use it on some other of my bike) simply because the segments (pearls) can fairly easily slip off the lining, which then results in a heck of a time fishing that out of the frame. Looks like the Jagwire might have solved that. I’m going to order that to see if I can’t get the cable drag solved.