Looks good, esp. the wheels outer part and the rim.  You seem to be
quite a perfectionist about the rim-tyre connection.  More important,
the connection between the spline and the outer part seems a bit broken
(probably because the first/last line of the png have no constant
color). I'm not totally sure about this :-) 

BTW, most tyres have some structure in form of radial/circular margins
from the vulcanization process, very small, but maybe some normal would
do that.  

I would really like to see the code :-)

Christoph

--
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/

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