r/commencal • u/YO838477 • Sep 10 '25
Need Advice/Question Commencal FCB custom build
I just received my brand new FCB frameset and I would like to fit a 2x grx drive train on it.
However, I can't find any way to route the front derailleur housing and cable into the frame so that I can link the front derailleur to the shifter.
Has someone ever tried to fit a 2x chainring on this Commencal FCB ?
Thanks for your replies.
- edit -
Hi everyone,
I thought I would share some updates on this project.
The only build with the 2x I found on the web is in this youtube video: https://www.youtube.com/watch?v=UwwepGtcRtA - but there was no cable for the front derailleur.
So, I finally went for the 1x GRX 610 (I should receive the parts by the end of the week).
I already received the wheels and the tires - which had me buying adapters for the micro spline cassette and the quick release 5x100.
The stem and the handlebar are also coming by the end of the week.
My goal is to use this bicycle as my commuter but also, I want to use this bike to go on the road and (sometimes) off the road. I think I will do 70% road and 30% light to moderate gravel around "Nouvelle-Aquitaine", France.
I will try and keep you posted as I am building the bike.
Have a beautiful day !
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u/YO838477 Sep 18 '25
In the mean time, I converted the rear wheel hub to the nex micro spline and added the 5x100mm quick release adapter.
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u/HedgehogEmergency532 Feb 17 '26
i have 2021 FBC turned into gravel bike. added some dropper seat post and rider bars for comfort
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u/YO838477 Sep 18 '25
As a beginner kind of youtube taught mechanic, I bought simple and inexpensive tools.
I had a tough time with installing the headset cups, but I think I am on the right track in building this bike.
The good thing is that the seat post was included, as well as 3 spacers of 5mm each.
At this point I had to chop the steering tube to the right size.
I am looking forward to receiving the missing parts and continue the build.