On Wednesday, July 8, 2020 at 12:44:43 AM UTC+2, wrote:
Is there a spacing difference between a 10 and an 11 speed crank? Pushing another speed in there I thought was done by narrowing the chain and not the crank ring spacing?

If I can remember correctly there is a small difference, but I used a 11 speed chain on a 10 speed crank without problems (Campy).

Lou