I have cheap performance bike brand 26x1.25" slicks on my fixed gear commuter. When patching the rear tube this morning on my way to work (pinch flat- my fault!) I noticed lots of little nicks and cuts in the tire. I've noticed the same on the front. They don't go through the casing, its just the rubber is cut. Most are no longer than 1/8", maybe one that is 1/4" at the most. But if you bend the tire, the cuts are shown to be all the way down to the casing but not through it.
I've not had any problems with the tires, and even though they aren't the kevlar tires, I don't get many flats on them. SO, do I *need* new tires? Or should I just keep on these until they're worn down to the casing? I don't know how to guage slick tires really. Treaded tires are easy, because when the tread wears down, you need new tires.
Any advice appreciated, thanks