I have 4 tires of my truck that are worn out and had to be replaced. I asked the tire place if I could have them back (they took money off my bill for saving them the disposal cost).

I would like to turn them into spawning attractors for RES. I'm not sure I want to dig out holes to get them low enough in the ground to be natural spawning habitat. Should I try to cut them through the tread into two halves to make the height half height when laying on the bottom?

If I drill holes for water drainage can I just lay them on the bottom and fill them with gravel for spawning areas?

I think this will help the original poster as well to comment on how close to space them and what depth. I imagine if you had different sizes of tires it would be good to arrange them in a random size pattern too?