Tried a quick search- no luck: Does weight of wheels really make much of a difference?

Here a good analogy
Grab the kid’s bike and spin the wheel as fast as you can. Now stick your fingers in the spokes.

Now try the same thing with a mountain bike.

This is purely hypothetical, i dont really expect you to do it.
But rotating mass is relevant, the heavier it is it would be harder to accellerate and to stop.