CST Ciudad 700x32c are bulletproof. I was going through so many tires and tubes. Especially on my back tire since I do a lot of skidding. I've had these tires for 2 or 3 days and have done quite a bit of skidding and don't see any signs of wear on the tread yet. They make going over brick roads and seams way smoother. My bike feels way more stable. The tires add a little extra weight to your bike, but if you aren't too worried about weight and just skidz and tricks they are freakin' sweet! They have a reflective ring along the side which is a cool little bonus. I do tricks, skidz and commute with my fixie so it helps to have a beefier tire. I dig'em.