No, this is not a defect. The stripe is known as the antenna compound, a special rubber element designed to discharge static electricity by conducting it from the tyre to the asphalt. It is a normal and intentional feature of the tyre’s design.
FAQ
What is the mandatory or preferred tyre pressure for motorcycle tyres?
Which type of tyre is best for my motorcycle?
Can I use different types of tyres, or even brands, on the front and the rear of my bike?
What does it mean if my tyre has an additional letter in the pattern name?
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