By definition, no, they are not...The cracks are not the issue; they are an indication of very old rubber...At this point its like driving on plastic tires, you will not get much traction, and if pushed harder, the tire will just come apart (chunks anyways!). You can still use it, but don't expect more than 10-20% of the tire original performance.
Specialized in BMW recycling, all OEM used parts
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