Fifty percent of trips made in the US are less than three miles long, and could rather easily be replaced with cycling as a transport mode. The blockchain-based Financial Incentives System gives people the extra nudge to replace the car with a more sustainable and space-efficient mode of transport. This is another example of how an individual economic incentive can serve as a tool for increasing cycling. The system allows cyclists to receive financial compensation from organizations, such as city governments or local businesses, that sponsor cycling. Using bicycle-powered sensors, cyclists collect and redeem activity data through contracts stored and executed on an Ethereum blockchain. The financial incentive system has the goal of achieving a more sustainable city, through increased cycling leading to decreased emissions, reduced congestion and improved public health.