Search new + high quality used tires online. Size 285 30 R21 starting at: $57.02. Tires in stock: 22. Available brands: 3 with 7 models. All season: 1. Summer: 21.. Selling all used tires at discount costs. All used tires go through 2 layers of inspection on specialized equipment. One year warranty + free shipping on all inventory ;) Happy shopping!