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10,974 Posts
Discussion Starter #1
Happy Memorial Day folks!

Noticed an interesting "higher density" material within the intermediate inner rib
It is tougher than the surrounding rubber (well at least by the fingernail test)
Did not see any of this info in all the reviews within the past couple years
This is on my Extreme Contact Sport tires

Maybe someone knows what this tougher circumferential ring is .....

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