Thanks for the response. What a shame Cervelo stopped providing the parts required. Especially considering the fact that the P5 dealer manual shows routing the cables that way with the EX10 cockpit..

Seems a 10-minute job just turned into a slightly longer one.. Ah well, when everything looks neat and tidy it will be worth it :-).

frame size.. 48" or 51" frame for 170cm rider?

Hi Jerome,

I’m looking to replace my wheels manufacturing bbright bb for a ceramic speed bb, or I may go with a new crank and just do a Dub bb/ crank. I’m assuming the Dub crank can be reused no matter what frame I go to in the future.

Any pluses or minus for going Dub or just better the stay with bbright and 30mm spindle crank?

Thanks

Hi Jeroen,

Looking at building up a P5 disc frame and sourcing group-set second hand.

For Crankset looking at Rotor ALDHU with a 24mm Axel, will this work with the P5d and do you know what BB I will need?

Thanks,
Nathan

Making good progress on the rear box and bb box for the 54 p5d. Just need to close the gap between front of box and rear of frame and do the same on the bb box. Hoping to have the boxes for the 54 finalized before the end of the week. Test fitting revised boxes on 56 also this week. I expect to start shipping production versions of 54 and 56 boxes 2nd week of November. I'm still looking for 51 and 58 frames to measure in the San Francisco Bay Area.

Use coupon code slowtwitch_october for $25 to order your box: https://custombikexcessories.com/...?olsPage=t%2Fcervelo

These look great. I don’t need these really but was wondering if the storage box would yield any aerodynamic gain by helping the airflow onto the rear wheel. Has anyone tested these and could confirm whether it’s drag neutral or drag reducing ?

As far as I know, no one has tested the bb box for the P5 Disc in a wind tunnel. I certainly make no claim that the box improves aero dynamics as I haven't tested it. I make too many different boxes for different bikes to be able to afford to test each one in a wind tunnel. :-)

If the filled in area improved CDA then surely Cervelo would have filled it in already? My guess would be that the box is a tiny aero penalty

What Jeroen said.
I had the same problem and eventually discovered the (UK) shop had supplied the bike with that part missing. See page 13 of build manual here, the bearing seal ring which should be affixed to the base bar:
https://www.cervelo.com/...nual_v6.7_web_2_.pdf.
I had terrible trouble getting the shop to even acknowledge the problem and their "cure" was to massively overtorque the stem and fork bolts.
Jeroen helped me to source the required part when I gave up on trying to get the shop to sort it.

When you strip it down you can see why that seal ring is an integral part of the system. It's not like a normal dust cover on a std stem set up which could arguably be left out. Without it in place on the P5 the headset will always work loose, if indeed you can preload in the first place.

It might be you have some other issue but I'd definitely check this first. I'd be interested to know where you got the bike from if yours is also missing.

Good luck.

Chris