Clone object in golang

clone.go

package main

import (
	"fmt"
)

type Wheel struct {
	// Diameter Wheel diameter in centimeters
	Diameter int64
}

func (w Wheel) Clone() *Wheel {
	return &Wheel{
		Diameter: w.Diameter,
	}
}

type Car struct {
	Registration    string
	FrontRightWheel *Wheel
	FrontLeftWheel  *Wheel
	RearRightWheel  *Wheel
	RearLeftWheel   *Wheel
}

func (c Car) Clone() Car {
	return Car{
		Registration:	c.Registration,
		FrontRightWheel: c.FrontRightWheel.Clone(),
		FrontLeftWheel:  c.FrontLeftWheel.Clone(),
		RearRightWheel:  c.RearRightWheel.Clone(),
		RearLeftWheel:   c.RearLeftWheel.Clone(),
	}
}

func main() {
	wheel1 := &Wheel{Diameter: 80}
	wheel2 := &Wheel{Diameter: 77}

	car1 := &Car{
		Registration:    "CAR-1",
		FrontRightWheel: wheel1,
		FrontLeftWheel:  wheel1,
		RearRightWheel:  wheel1,
		RearLeftWheel:   wheel1,
	}

	car2 := (car1)
	car2.Registration = "CAR-2"
	car3 := (car1)
	car3.Registration = "CAR-3"

	fmt.Printf("%#v\n", car1)
	fmt.Printf("%#v\n", car2)
	fmt.Printf("%#v\n", car3)

	fmt.Println("-------------")
	car1.RearLeftWheel = wheel2

	fmt.Printf("%#v\n", car1)
	fmt.Printf("%#v\n", car2)
	fmt.Printf("%#v\n", car3)
}