Scrap tire from highway shoulder.
Scrap carpet from a dumpster.
Old plastic shopping bags.
and some shoe glue.
Angle grinder with cut off wheel.
Something to cut rubber and carpet, I used tin snips and medical scissors.
Step 1: Mark and Cut
Then use a cut-off wheel on a grinder to cut through the steel cords in the tire. (very smoky.)
Once through the cords, cut out the tread with some tin snips or something.
This is messy with black stuff everywhere; put down some cardboard or something. This also smells like the county fair demo derby.
Step 2: Drill Holes
Step 3: Cut Carpet to Fit
Make holes in the carpet to match the tread holes drilled earlier.
Glue the carpet to the tread with some shoe glue.