Copy the model 16 times, or however many times you need to make the treading you want. Then weld all the points that connect to turn it from 16 pieces to 1 mesh - all connected (Fig.08).
Mirror the model over, weld the middle points, and then remove the middle edge (Fig.09).
Apply a bend modifier and weld the connecting points (Fig.10).
Pull out the edges so that we can deform them outside later (Fig.11).
Apply an FFD modifier box, set it to 5x5x5 and scale in the edges (Fig.12).
Apply an edit poly and select the edges on both sides (Fig.13).
Extrude the edges in and chamfer the edges by 3 to get a smooth transition (Fig.14).
Just place the rim - and there you go! (Fig.15)
Hopefully this little tutorial will help you to model tyre tread for your own projects. This is just one of many ways to model a tyre, but I use this method the most (Fig.16).
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