Genuine BMW M5/M8 F90/F91/F92/F93 20 M Performance Alloy Wheels and Tyres. Rim design M Performance Y-spoke 863. Rim color - Porsche Gold. Rim width in front 9.5J. Rim width at the rear 10.5J. Tire tread Pilot Sport 4S. Tire size in front 275/35 R20. Rear tire size 285/35 R20. Speed indexY / Z -