How to model a wheel (tyre) This is how far I got:



But the tyre is not smooth and has some artifacts on it. If I use more subsurf, it gets more weird.

The steps I took:
The bump map tyre will be of high poly, right? This is what I did:


Make a base mesh with high subsurf.
Model a patch of seamless pattern (this is very hard) and shrinkwrap it to the base mesh. Here it is:





Array it using empty as offset.


More info: https://blenderartists.org/forum/showthread.php?442524-Modeling-a-motorcyle-tyre

Can anyone help in in this regard? I am modeling a wheel for harley davidson sporster.

I also tried the Blenderguru's tutorial. Didn't help as his tutorial aims toward different bump.
I would try using a bevel modifier and add it to the top of the modifier stack. It adds more cuts to the edges giving it a more defined look to the overall shape you may be looking for.