Continental 0121228 Ultra Gatorskin 700 x 28 Black Tire has a durable carbon black mixture, a well regarded puncture protection system and the DuraSkin-anti-cut fabric to turn the Ultra GatorSkin into a real long distance runner. In varying widths from 23mm to 32mm it can be used on the way to work as well for training for road races or for sportifs and audax. A durable, tough tire at a really nice price. A modern tread design that collects less debris and the expansion of the product line to the new dimension 28-559 for fast MTB street riding. The DuraSkin technology protects the sidewalls from cuts, punctures and abrasion. The Safety System technology provides additional puncture protection by combining nylon fabric with Kevlar, positioned between the tread and the casing. Specs: Weight - 320 grams; Recommended PSI - 95; Maximum PSI - 116; PU - 10.