A Turbo wheel has a solid hub, horn contact pin, hard plastic flat horn button and a narrower hub surround with a slightly different design similar to the Petri Sport wheel. The e21 wheel has a horn button that is thicker with a rubberized coating over it, a collapsable black hub, horn contact ring, and a different plastic hub surround. It will not mount to a 2002 without modification. As another member pointed out the wheel portion itself is identical. The later e21 3 spoke wheel is also the same design but is completely coated with foam rubber. The wheel in the pictures is definitely the e21 variety.