This is based on only the first 60 miles put on (700c x 28mm) Continental Ultra Sport III folding tires. Installation: pretty hard to do. After sweating to get the first one in place, I've decided to warm up the second one before trying to install. Warming up works! Tires are light, have low rolling resistance, and excellent grip. After 60 miles mostly on chip seal pavement with eventual dirt or cracked stretches, no flats. Time and mileage will tell more about tread wear. Up to now no wear sign. As for BTD service, swift and courteous.