Remove extra circles

I had to made a cylinder larger, the solid inspector says everything is shiny, but I have two extra circles which I cannot remove. What is the proper way to do it?

larger_gear.skp (267.6 KB)

you don’t have to delete them all.

just delete ONE small bit, then re-run solid inspector. it’ll delete the rest and make it a solid.

The circle you highlighted is not a circle as it has been exploded. It is now a collection of very small sides that can be individually highlighted/selected and then deleted.

Beaten to it by ateliernab! Will delete post if required.