SphereCollider.radius
var radius: float;
float radius;
radius as float
Description

The radius of the sphere, measured in the object's local space.

The sphere radius will be scaled by the transform's scale.
	collider.radius = 10;
using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        collider.radius = 10;
    }
}
import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		collider.radius = 10