4 Inch Brake Drum For Go Kart Cart Car Mini Bike ATV Replaces for Size: 4" Brake DrumFitment: Suitable for Go Kart Cart Car Mini Bike. Specs: 1 x 1 x 1 inches Machined Drum for Brake Band Use. Center Hole: 1 x 1 x 1 inches in diameter. Bolt Hole Patterns: 5/16" & 3/8". Package Include: 1x Brake Drum. Size Description: 1 x 1 x 1 inches.