Cervelo R2.5 fork rake?

Any one know the designed fork rake for the R2.5 on a size 54?? I picked a frame up and I’m looking to add a fork but want be sure I get it right. I do know that this frame came with Easton forks but not clear on the rake.
Also, are shims available to convert the seattube from a 28.6 to a 27.2?
Thanks
Paul

43mm rake, and USE makes shims from virtually any size seattube to virtually any other size seatpost.

be sure to check the fork height, as well. not all forks are the same length. if the fork doesn’t match the design criteria. it will screw up handling.

i have no idea what the Cervelo was designed around.