Have they held air all that time? My slix always go flat in,like,two days.Unless they got tubes in them.I would check for cracks and dry rot. If they seem sound and safe,no worries. As far as hooking,scratch with your fingernail(if you use someone elses fingernail the sensitivity is low :? huh?) to see if they still seem "gooey". Old dry slicks that probably won't hook usually feel like roughed up leather. That's the best analogy I can come up with sorry. Shoot for gooey tires with no cracks!....I've always said that
