The wheels are a blur to me too, but I remember the first Mongoose came out in the mid 70's had some type of cast 5 spoke. Seems like they were a little on the heavy side.
Wheelie riding bikes they were!!!! I was able to ride them continuously, even mastered making turns and going up hills.
I left my blue bike at my dads house after going to college, I think they sold it in a garage sell for $10. They called an asked before doing it, I was so involved in cars by then (and beer drinking) I couldn't think of a reason I would ever need it again.
Now my daughter thinks it's the coolest thing since hot wheels so we bought her an old frame and she's sanding it down for fresh paint. Says she wants to paint it blue.
