Based on the information provided, no identifiable LGBTQ+ characters or themes were present in the film "Unser Stahlross." Therefore, an evaluation of its portrayal of LGBTQ+ elements cannot be conducted.

The film 'Unser Stahlross' (1951) does not include any identifiable transsexual characters or themes. Its plot focuses on a boy's adventures with his bicycle, resulting in no depiction of transgender identity.

The movie does not contain any action or adventure elements.

There is no widely known source material or prior adaptation for "Unser Stahlross" (1951) that would establish characters with canonical genders, nor is it a biopic of historical figures whose genders were altered. Therefore, no gender swaps are identified.

There is no evidence that "Unser Stahlross" (1951) is an adaptation of source material with canonically established character races, nor does it depict historical figures. Therefore, no character's race could have been altered from a pre-existing depiction.