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A few weeks ago, I fitted some Rotors to a P3C using BSA30 cups and didn't need spacers.
The shaft did need to be knocked in: I seem to remember the instructions said to lube it.
All I can think of, is that the cups or the cranks aren't fully seated.
The cranks I fitted were the OE version they made for Cervelo, so the spider incorporated an 11.5mm spacer (for use with BBRight): Velotech swapped the spider for the standard width version. I don't think they make OE Flow, which would otherwise explain it.
Scilly.Suffolk
I'm trying to fit a set of Rotor Flow cranks to my Cervelo P2c.
The P2 has a standard BSA BB shell and so this compatibility chart tells me that I need to use a BSA30 bottom bracket. I have fitted the BSA30 BB cups as described, and this diagram leads me to understand that no further spacers are required. However, when I try to install the cranks I encounter 2 problems:
1) The installation of the crank spindle is incredibly tight... far tighter than I would have expected from previous SRAM/Shimano installations, and certainly nothing like the installation videos I've seen online (although those don't seem to be using BSA30) e.g.1.
e.g.2.
. It took some unsettlingly vigorous hammering with a rubber mallet to fit the NDS crank, and even more effort to remove it again. Is this normal?
2) Once installed the spindle appears to be too short, or to phrase it another way, whilst the splines on the spindle poke out of the drive side BB cup, there is not enough engagement to allow the drive side bolt to thread into the spindle. The bearing preload system on the NDS is backed off fully and tight against the NDS crank arm so that is not the problem. This is obviously not normal but has anyone else encountered this problem before or have a solution?