Ruota 20" MTB posteriore

  *******   *****    *****   *******   *****     ***    
  *        *     *  *     *  *        *     *   *   *   
  *              *  *     *  *        *     *  *   * *  
  ****         **    ******  ****      ******  *  *  *  
  *              *        *  *              *  * *   *  
  *        *     *       *   *             *    *   *   
  *         *****    ****    *******   ****      ***