The transition from spare tire to formal means that one person is only the spare tire of the other half at first, and then the relationship between them develops to a deeper level and eventually becomes a formal lover relationship. The phenomenon that the spare tire turns positive is very common in modern society. The reason may be that the other half knows the natural advantages of the spare tire, or it may be that the spare tire stands up in time to help the other half at a critical moment.

The phenomenon of the spare tire turning positive is also controversial on social media. Some netizens think that it is very cheap to turn the spare tire into a regular one, which is a kind of harm to people who become spare tires. However, many people believe that it is normal for a spare tire to turn positive, just like a general love, which requires the consent and efforts of both parties.

The relationship between men and women will change after the spare tire turns positive. Changing from the role of "resource reserve" to the role of "lover" means that the two should maintain this relationship in a way of equality, respect, trust, mutual support and care. Only in this way can the spare tire really turn positive and become a real lover with the lover.