Riding safely, safety equipment, and safe places to ride.

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Why do many full face bicycle helmets not conform to the ASTM F1952 standard?

It seems to me that a lot of full face bicycle helmets do not conform to the requirements of the ASTM F1952 standard for downhill bicycle helmets. Some noteable examples from the best selling list of ...
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Black threads are coming of my tire. Does it need to be replaced?

One of my bike tires have started shedding long black threads. I'm assuming that this means that something is not right. The tire has a folding bead. Does this mean that my tire should be replaced as ...