These Associated SR27 tires are sized for 11mm hex fitment and molded at 20 Shore durometer for a softer compound suited to on-road and Mini-Z style racing. The set includes one solid rear tire and three open-center front tires, covering a full four-wheel replacement. They are a factory Associated replacement designed specifically for the SR27 platform. Features: 11mm hex fitment 20 Shore soft compound Set includes front and rear tires On-road Mini-Z compatible sizing 7/7/26 cs