Securing Castle Nut For Rear Stroke Bearing- BGM Original- VESPA Inner=37mm, Outer=49mm, Slots=9- Vespa VNA1T, VNA2T, VNB1T, VNB2T, VNB3T, VNB4T, VNB6T, VBA1T, VBA2T, VBB1T, VBB2T, GL (VLA1T), GT (VNL1T), Sprint (VNL2T 30001-76107), GTR (VNL2T -11827