Based on the information provided, the film 'Bicycles are Beautiful' does not feature any identifiable LGBTQ+ characters or themes. Therefore, an evaluation of its portrayal of LGBTQ+ elements is not applicable.

Based on available information, the short film 'Bicycles are Beautiful' does not appear to feature any identifiable transsexual characters or themes. The narrative focuses on a young man's journey to find a new bicycle, with no indication of transgender-related content.

The movie does not contain any action or adventure elements.

The provided information for "Bicycles are Beautiful" (1974) does not include any details about source material, prior canon, or historical figures. Without a baseline for established character genders, it is impossible to identify any instances of a gender swap.

This 1974 film is a short documentary about bicycles and does not feature established characters from prior source material or history. Therefore, there are no canonical characters whose race could have been altered.