This hoverboard doesn't have any unlockable upgrades.
Cruiser is the twenty-first limited hoverboard in Subway Surfers. Like any other hoverboard, it protects you from crashing for 30 seconds. When crashed, it will need to recharge for a few seconds in order to use it again. It is a limited edition hoverboard exclusive to Subway Surfers World Tour: Los Angeles. It can be purchased with 50,000, just like most of others limited edition hoverboards. It has the appearance of a cruiser car.