2nd consecutive set of Sumitomo HTR Z III's on the Z4. Ditched the awful run-flat's that were OEM. For the money the Sumi's are good tires. I live in the south so a summer tire is pretty much ok year round. Got 28,000 miles out of the previous set of HTR Z III's. I have the same size tires on all 4 corners so I can rotate every 5,000 miles. Nice even treadwear given the car's rear suspension is negatively cambered. Would recommend these tires wholeheartedly for similar application. I believe they represent a good value vs. the higher priced Michelin, Bridgestone, Continental alternatives.