These pictures show the stock bearing (part # 06-7688, $39.95) on the left and the sealed bearing (part # 06-7688/S, $39.45) on the right. You will notice that the sealed bearing is slightly thicker than the stock bearing (.057" thicker).
For more information, see the technical article:
Wheel Bearing Upgrade Instructions
Norton Parts ..Wheels, Brakes ..Brakes
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