I know is chromoly frame, and serial number starts with 8D30D334... I will add pictures, if anybody can help would be great...
Edit from a later post:
Yes, I found out that the tires had been replaced and many other parts. And yes the tires were close to 35 or 33. We even had a hard time fitting the front wheel, the wheel seemed to be big for the fork. It came out pretty nice. I will try to post some pictures.
The plastic part was a torn up reflector.
I ended up giving it to wife, and got myself a new Specialized Hardrock 29 MTB, and I am riding every day an average of 10 miles.