Just had another look at my tires. Ugh. Looks like I need a new set for the next season, these ones have so many cuts, some even up the sidewalls, and sharp pebbled embedded within...
What criteria do you use to swap for new slicks?
If they look like this then you are definitely ready for new ones:
Here are a couple criteria I look at:
1. if they have glass cuts in the tread area that reach the casing's fabric layers/cords, then that's a vulnerable spot. It's discretionary as to where to draw the line on those.
2. spin the tire fairly fast and take the "big-picture" view from the rear or front. If you see herniation of the casing resulting in a bulge+twist, that tells you the casing is failing and has a much higher risk of blowout. Toss it.
3. if the tire is getting a square-topped appearance, that tells you the tread rubber in the center is getting thinner and will have less puncture resistance. That one is also discretionary but you have to draw the line somewhere, unless you're the person whose tire is pictured above, in which case just keep going
4. if the sidewall has cuts that compromise one or more layers of the casing's fabric, that's a blowout waiting to happen. Toss it, or save it for the indoor trainer.
Speaking for myself, I usually lose high-performance road tires to glass cuts before they're even half worn-out. The good die young.
Today I took the direct 3.5mi route to work. Work kept me a little late, and when I got off at 7PM I had made it through the day on a PBJ and a Coca-Cola, so I didn't have a ton of energy, but I didn't want to just cave in and crawl home either :hmm: So I went for a zippy urban jam with the mountain-commuter bike, about 11 miles at 18.4mph with 500ft of ascending. Good enough!
Total: 41,952