Madikeri: Two motorbike riders met their tragic end, after their vehicle was allegedly knocked down and runover by a car on Gonikoppa-Thithimathi-Mysuru Road here yesterday afternoon. The deceased have been identified as Shivakumar (25) of Nanjangud and Mohammed Shiyab (27), a native of Palakkad in Kerala. The duo along with their six other friends, were…