It's been a long time coming, but I finally pieced together a tri/tt bike after a 6 year hiatus from the sport (turns out grad school and raising 3 kids under 5yo takes up a lot of time).
I recently found a deal on a 2012 Cervelo P2C on FB marketplace and thought it would be a good opportunity to take on a project I've always wanted to do -- turn a classic Cervelo P2C/P3C into as close to a superbike as I could reasonably get it. I decided to opt for an Ultegra Di2 build with mostly secondhand parts sourced from ebay and the classifieds.
Di2 internal installation -- I thought some others here might like to see how I was able to get the Di2 about as close to internal/clean as possible on a frame like this, but it was a huge headache to deal with and I probably wouldn't want to deal with the hassle again in the future. Setting it up like I have it required that I drill the frame in two locations:
1) Top tube behind the stem -- same location/process as the well-known TriRig cable mod, although just a single hole for the lone Di2 wire to enter the frame and travel through the downtube.
2) Cable exit hole on the bottom side of the bottom bracket for the main Di2 wire traveling down the downtube, out the drain port, up through the cable exit hole and into the seat tube to connect to a SM-JC41 junction box. This one was quite a bit trickier -- I had to slightly enlarge the exit hole ~0.5-1mm to fit a Di2 wire through, however in order to then get the wire up into the seat tube, I had to insert the drill approximately 1 inch further straight up into this hole and immediately behind the aluminum bottom bracket sleeve that is permanently fixed on these frames.
Other notes about the Di2 install and connections -- I have a bar end EW-RS910 junction box installed in the left aerobar extension that connects the left 9160 TT shifter to a SM-JC41 junction box hidden in the TriRig Sigma XF stem. The right 9160 shifter routes out the back end of the right extension and down into the same SM-JC41 junction box in the stem, which is connected to a 1600mm Di2 wire that routes out the back end of the stem into the top tube drill hole, down the downtube, and then up through the drilled cable exit hole (#2 above) where it enters the seattube and is connected to another SM-JC41 junction box hidden there. That junction box connects to the FD, RD, and the internal battery (I also have a wireless EW-WU111 unit connected between the battery and this junction box). Note that the Di2 wire that connects to the RD can route through the frame just fine (there is a drain hole at the end of the chainstay that the wire can exit). All this is to say that yes, it is a HUGE pain, and yes, it can be done.
Here is the parts list with some photos below:
Di2 9160 TT shifters (I've been very pleased with Syncro Shift by the way!)
Ultegra 6850 RD/FD/chain/cassette
TriRig Omega front and rear brakes w/ Jagwire Elite Link cable housing
TriRig Sigma XF stem
Vision TriMax Carbon Aerobars + Extensions
Vision TriMax Aero Carbon crankset (54/42T)
Adamo saddle (will likely switch out soon -- not a good fit for me)
Enve 6.7 Tubulars with Veloflex Arenbergs
Hope you enjoy! Happy to answer any questions about the build. Out of curiosity, any idea how much time a bike like this gives up to a more modern superbike? I know fit is king, so assume this bike fits me great (it does).
I recently found a deal on a 2012 Cervelo P2C on FB marketplace and thought it would be a good opportunity to take on a project I've always wanted to do -- turn a classic Cervelo P2C/P3C into as close to a superbike as I could reasonably get it. I decided to opt for an Ultegra Di2 build with mostly secondhand parts sourced from ebay and the classifieds.
Di2 internal installation -- I thought some others here might like to see how I was able to get the Di2 about as close to internal/clean as possible on a frame like this, but it was a huge headache to deal with and I probably wouldn't want to deal with the hassle again in the future. Setting it up like I have it required that I drill the frame in two locations:
1) Top tube behind the stem -- same location/process as the well-known TriRig cable mod, although just a single hole for the lone Di2 wire to enter the frame and travel through the downtube.
2) Cable exit hole on the bottom side of the bottom bracket for the main Di2 wire traveling down the downtube, out the drain port, up through the cable exit hole and into the seat tube to connect to a SM-JC41 junction box. This one was quite a bit trickier -- I had to slightly enlarge the exit hole ~0.5-1mm to fit a Di2 wire through, however in order to then get the wire up into the seat tube, I had to insert the drill approximately 1 inch further straight up into this hole and immediately behind the aluminum bottom bracket sleeve that is permanently fixed on these frames.
Other notes about the Di2 install and connections -- I have a bar end EW-RS910 junction box installed in the left aerobar extension that connects the left 9160 TT shifter to a SM-JC41 junction box hidden in the TriRig Sigma XF stem. The right 9160 shifter routes out the back end of the right extension and down into the same SM-JC41 junction box in the stem, which is connected to a 1600mm Di2 wire that routes out the back end of the stem into the top tube drill hole, down the downtube, and then up through the drilled cable exit hole (#2 above) where it enters the seattube and is connected to another SM-JC41 junction box hidden there. That junction box connects to the FD, RD, and the internal battery (I also have a wireless EW-WU111 unit connected between the battery and this junction box). Note that the Di2 wire that connects to the RD can route through the frame just fine (there is a drain hole at the end of the chainstay that the wire can exit). All this is to say that yes, it is a HUGE pain, and yes, it can be done.
Here is the parts list with some photos below:
Di2 9160 TT shifters (I've been very pleased with Syncro Shift by the way!)
Ultegra 6850 RD/FD/chain/cassette
TriRig Omega front and rear brakes w/ Jagwire Elite Link cable housing
TriRig Sigma XF stem
Vision TriMax Carbon Aerobars + Extensions
Vision TriMax Aero Carbon crankset (54/42T)
Adamo saddle (will likely switch out soon -- not a good fit for me)
Enve 6.7 Tubulars with Veloflex Arenbergs
Hope you enjoy! Happy to answer any questions about the build. Out of curiosity, any idea how much time a bike like this gives up to a more modern superbike? I know fit is king, so assume this bike fits me great (it does).
