Yep, just using one spacer, you are correct.
Cervelo P-Series is press-fit (BBRight, as you said).
If I understand what youâre asking, you need a BBRight bottom bracket for a SRAM Dub spindle which is 29mm.
Something like this:
They have others for different cranksets.
And I like the thread-together BB as it can prevent common issues with press fit.
thank you spudone for your kind attention to my question 
Actually I have on the a bike a SRAM group and a BB DUB.
Because I switch to Shimano and need to change it, I will go for a PF (never had an issue in the past)
do you think or suggest that is better a 24 or 30mm spindle?
regards from icy Italy
I built my bike with a 24mm steel spindle which is standard for shimano cranksets. 30mm are typically aluminum if that matters to you. Both can also be found in titanium, I think.
Someone here who builds more bikes might have a stronger preference - maybe @Slowman
Since thread-together bbs became an option for press fit, I wouldnât use anything else.
Especially with Cervelos, which donât have the best reputation for their press fit offerings
I originally tried a CeramicSpeed press fit BB in my p-series. It always creaked under load.
I finally gave up and went to WheelsMfg. Not the one above, but the BBRIGHT-OUT-3 (angular contact bearings / 24mm shimano). Highly recommend it.
Does anyone know if you are technically allowed to use a round 10mm rail for the saddle rail on a p-series? Itâs that style of saddle clamp, but of course cervelo decided to use their own weird shape. I just built one up and I think there was one of these little silver dumbell type parts in the box.
That would seem to imply that you can use a round rail like the TriRig beta carrier. I installed one out of curiousity and while it doesnât look right, it feels just as sturdy as the stock setup.
Hylix sell a seatpost with a round shape for the P5. I think it is the same for the pseries. i can mesure the size of the hole if needed
Currently building mine with tririg alpha one and axs groupsest, I am encountering some issues.
@Crujones_33 , you didnât use the plastic part in front of the bento, and your bento is slided far forward. Doing so, i have found itâs rubbing the bento when steering.
Also, both of your brakes hoses come from the front of the bar.
On his video building a p-series @realbdeal uses the bento plus the plastic part and the alpha one. Did you cut the plastic part a bit? It doesnât fit for me, the stem of the alpha one is too big.
And your brake lines come from the top tube in front of the bento.
What is the best route for those brake lines? Near the stering tube in front of the bar from the top tube?
Should i use the plastic part near the bento? And do i need to cut it in some ways?
Thxs
Just had a p-series built up by a bike shop with an alpha one. They used the plastic part but cut/shaved it down a bit to fit. I am also going to scoot the bento back very slightly from what you see in the photo.
1 Like
Interresting. Brakes going through the fork or top tube?
Both brake cables are coming out the back of the stem, presumably down thru the bearing cap. Not sure about how the rear brake cable is routed thru the bike. Front brake cable down thru the fork.
I did the exact same thing as the other reply. Just a bit of trimming where needed. Sorry I donât have the bike in my possession anymore or I would grab you some pictures.
Went back and forth on which way to route the cables but decided that I liked out the back of the stem better. The rear brake cable is pretty standard routing and the front just kind of wraps around the steerer tube and down into the fork leg. Iâve seen plenty of people do just the front cable under the stem though like cervelo intends.
1 Like
Nice pedals 