Originally Posted by
HillRider
Despite Cannondale's recommendation for no spacers above the stem i can't believe a 2 mm spacer will compromise the steerer's strength. I'm sure they don't want 10 or 20 mm there but 2 can't be an issue.
+1, and if you want to absolutely stick to their instructions then just put a small spacer under the stem to create a gap at the top so the headset preload adjustment can be made properly. No need to cut the steerer.