PROLINE PYRAMID 2.2 Z4 ASTRREAR TYRES ON WHITE HEX WHEELSThis is a pair of Pre Mounted Pyramid Buggy Rear Tires. Astro turf racing has been steadily growing in the U. S. and around the World and Pro Line has you covered with the Pre Mounted Pyramid buggy rear tire! The Pyramid features hundreds of large pyramid shaped pins with the knife edge pointed front to back and side to side for maximum grip that stay sharp even as they wear down. The carcass shape has been optimized for the demands of Astro racing,