New Page 1 The Continental Competition Slick Tubular Tire features five layers of Polyamide casing and a tread strip of high performance ASC (Advanced Silica Compound) combine to provide you the fastest and safest way of connecting all of your power to the ground. Very high puncture protection, low weight and the lowest rolling resistance available in any tire. The tool that world class performers rely upon, from the peloton of the Tour, to the solo efforts of the Ironman.