I encountered a problem when modeling an inside of the wheel. The problematic part is where a spoke joins a rim. I want both the rim and spoke to have sharp edges, but when I crease the transition between them, the circular shape of the rim is no longer maintained there. And when I don't crease the transition it looks weird. Here is how the creasing looks like without subsurf in edit mode:
If you would like to do some tests on the model, you can download it here. Is there a better way to get sharp edges than via creases? Thank you in advance!