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3 Comments

  1. There’s absolutely no way to tell from a photo.

    You can only check by measuring the thickness, but you need accurate calipers or a micrometer for that. The minimum thickness is 1.5 mm. But again, you need accurate tools to measure it, since they start out at a thickness of 1.8mm, meaning that a disk with a thickness of 1.6 mm still has 33 % of its life left.

  2. williamfanjr on

    Get a vernier caliper and measure. If they’re thinner than 1.5mm you need to replace them.

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