thats certainly a neat little tractor

I’ve been riding a mountain bike on the road for the past few weeks. It’s a dual-suspension free-ride bike, so it’s heavy, cushy, and has big, knobby tires. But it’s a very good city bike. Potholes, uneven pavement, curbs, riding across dirt and grass when the road ends, it does it all well. It’s not fast (though certainly not slow), but I still get a great workout. For city riding I add a little more air pressure to the tires, and adjust the suspension more firmly.

I would just ride it as is, maybe a nicer saddle, pedals & grips. Tires are funny, if you ride em enough they will eventually become slicks... I've been working on a pair for a while now.
https://cimg3.ibsrv.net/gimg/bikefor...9313af8786.jpg