Each bike in the game has two versions. A Pro version and the standard or regular version. The Pro version is designated by the star icon as shown below on the left bike. The difference between the two is how much their attributes can be upgraded. For example, the regular Bike 5 can only be upgraded a limited amou...
When you beat a Pro boss you will unlock "all upgrades" on a bike. This means that the bike can now be upgraded to the max amount of 28 in all attributes (speed, pump and jump). This is the same as bike 7. This means you can race on bike 1 (or any Pro bike), but at the same speed, pump and jump attributes as bike 7...
When you unlock a new bike you have two options. 1. Use cash to purchase the bike without any upgrades 2. Use gold to purchase the bike fully upgraded Buying the fully upgraded bike allows you to use the bike with the max speed, pump and jump allowed for that bike. It also comes with an exclusive paint job! It's ...