> For the complete documentation index, see [llms.txt](https://biken-finance.gitbook.io/biken-whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://biken-finance.gitbook.io/biken-whitepaper/fitnomics/profitability-repair-and-upgrade-costs.md).

# Profitability, Repair & Upgrade Costs

Each bike and bike part can be upgraded to a maximum level of 100.

The maximum level that a bike part can be upgraded is the level that corresponds to the bike it belongs to. 

For example, if the bike is at a level 10, the parts of that bike can also be upgraded to a level 10. This means that any bike with a level 10 cannot have level 11 or level 15 bike parts. 

Players can only earn BKV tokens at the beginning.\
BKN tokens are available to earn only after the Bike NFTs are upgraded over Level 30.

![Mountain Bike](/files/wePeeMc9Ovin6z0DmnpE)

![Speed Bike](/files/AS3Lor3yPjsdZ7JUC1EY)

![Universal Bike](/files/wVjRUA5JRoMmCSnEG0VE)

![Ant Bike](/files/okyqsv428vG11Lh9bpUe)

![Dog Bike](/files/9mKmpMKBfeXkABuuZRrC)

![Bike Upgrade Cost / Effect](/files/JmYrl1vyt4iNDUx6ojw8)