At Tire Streets, we stock 315 40 R21 tyres from a wide range of leading tyre manufacturers such as Accelera, Zeetex, Otani and more. Our extensive range of tyres in the size 315/40R21 offers excellent handling and grip on both wet and dry road conditions. Not sure whether size 315/40 R21 tyres are correct for your car? Use our quick vehicle registration number tool below to check for free.