Brake Drum and Wheel Hub Assy - (4) 10mm Studs - Coolster 3125A, 3125C, 3125X8, 3125XR8 Photograph ID of mounting hole in

ID of mounting hole in tab: 8

Aprilia Leonardo 300

Spline area diameter:  12

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Brake Drum and Wheel Hub Assy - (4) 10mm Studs - Coolster 3125A, 3125C, 3125X8, 3125XR8 Photograph ID of mounting hole inWheel Hub and Drum Coolster 3125A, 3125C, 3125X8, 3125XR8 This is a popular front wheel hub and drum assembly used on many 125cc atvs. Please check measurement and pictures before ordering. Hub specs: Black ID of brake hub: 16. 7mm (0. 66 in) ID of drum: 85mm OD of brake hub: 136mm (5. 35 in) OD of drum: 99mm (3. 88 in) (4) 10mm*1. 25 studs Mounting distance of studs: 76. 2mm (3. 0 in) Mounting distance of studs across center of hub: 108mm (4. 25 in)