The first thing I made for the tire was the rim, on FIg 20. you can see it in shaded with wireframe, shaded and finally rendered. I just made the profile, revolved it, and cut away the parts that wasn't needed and trimmed the edges.

Next thing to do is model the actual rubber of the tire, some might do this with bump maps but my oppinion is that it looks completly ridiculous.

First thing to do is to figure out how the pattern for the tire is, for this I used one of my reference images I took at my dealer. But as I'm written this I can see I made a mistake, I assumed the tire was mirrored over the middle but I see now it isn't.. ups.. The pattern is tiling all the way around the tire, so it's obvious to just make a small pieces and tile it, on Fig 22. you can see the small piece I've made, ready to tile along the x-axis.

I then copied the piece out, how many times I don't remember, you can count for yourself on Fig 23. But the count is quite important, to make the tire I bend all the pieces, and the count pretty much decides the radius. The result can be seen on Fig 24 I welded all the vertices of the tire, and extruded all the open inwards to "form" the finish rubber tire. On Fig 25. you can see the final tire with textures and everything rendered with finalRender plus a bit of photoshop work.