No not racing tires. Rear tires go 2 to 1 front and sometimes 3 to 1. It depends on the miles you run but we usually get 2 or 3 months out of a rear tire. The normal soft sportbike rear tire is good for 5 to 6,000 miles. During the hot summer months, tires go really fast as the rubber is much softer. You can use up a rear tire in one day at the track in the desert. They cost $200 to $250 each but some are more. We had a stack of 10 rear tires in my garage but used them up, lol. 😃 The 10 to 20K is sport touring tires.