Pirelli P Zero Corsa diameters...
Front: 255/35-ZR19 measures at 25.94" OD
Rear: 285/30-ZR19 measures at 25.88" OD
Unloaded but inflated and mounted. The true rolling circumference would be fractionally less than Pi times the OD due to the tire flattening against the road surface when loaded.
2010 BMW M3 Coupe M-DCT w/Tech-EDC, BMW M Performance Exhaust, BPM: Stage I / Euro MDM / DCT / Steering, Space Gray / Fox Red Extended, and a Trunk Monkey known as "Der Stig", plus the daily driver...
2011 BMW 135i M Sport DCT, w/BMW Performance Power Kit, Exhaust, and Brake Rotors, Space Gray / Coral Red, known as "Stiggie" with an outlaw F20 "M135i" badge.