Features: 1Applicable Model: Bearing flange steering knuckle is installed on the left and right front wheels, and is applicable to Quad Bike ATV Go Kart with 5in tires. 2Safe Steering: The steering knuckle transmits and bears the load at the front of the car, supports and drives the front wheel to rotate around the kingpin, making the car turn stably. 3Durable Construction: Forged with high hardness steel alloy and heat treated to provide better finish and ensure high bearing hardness, wear resistance and high strength. 4Direct Replacement: Replace the short axle knuckle of the front wheel hub of the original vehicle to provide a smoother driving experience, and it will not break even under various bad road conditions. 5Detail Size: Flange center hole diameter is 17mm. Flange stud diameter 6mm. The distance between flange mounting holes is 48mm. Steering knuckle stud 17mm. Item Type: Wheel Hub Steering Knuckle Set Material: Steel Alloy Location: Left and Right Front Wheels Center Hole Diameter: Approx. 17mm/0.67in Hub Mounting Hole Distance (Center To Center): Approx. 48mm/1.89in Fitment: For 5in Tires Quad Bike ATV Go Kart 2 x Wheel Hub Bearing Flange 2 xSteeringKnuckleSpindle 2 xScrew