noob question, and since im too afraid of my father laughing at me, i'll ask you, when the wheel turns, the caliper is stationary right? and the only parts you see turning is the wheel and the rotor right? or am I wrong and the whole thing spins?
Looks like the body is just floating on the wheels, which by the way look out of proportion to the car.
Either the body-shadow on the wheels needs some lower opacity, and/or make the wheels smaller.
And as someone said, the back tire isn't blurred.
Awesome to see this on a mug! Have you ordered one for yourself yet?
I've learned for my mug sales the cropping of what gets printed on the mug is not always consistent, so I put a 1px black border around the edge and then an additional 5% white around the edges. That way you are sure to have your entire image show up on the mug.