This part has two variations. In one of the variations what is presumably a sprue mark is a pitted hole in the tire. In the newer variation the sprue mark has a square characteristic and is less noticeable. The newer variation also has words/numbers molded into the side of the tire whilst the older variant does not. There appears to be no functional difference between the parts.

This Tire & Tread fits with the following Wheel:

• Part 30027u Wheel 8mm D. x 9mm (for Slicks) - (Undetermined Hole Type)
• Part 30027b Wheel 8mm D. x 9mm (for Slicks), Hole Notched for Wheels Holder Pin
• Part 74967 Wheel 8mm D. x 9mm (for Slicks), Hole Notched for Wheels Holder Pin, Reinforced Back
• Part 74967pb01 Wheel 8mm D. x 9mm (for Slicks), Hole Notched for Wheels Holder Pin, Reinforced Back with Yellow Rim Edge Pattern
• Part 30027a Wheel 8mm D. x 9mm (for Slicks), Hole Round for Wheels Holder Pin