Question: How can I slow down my bike if it's going too fast downhill?
Option 0: If your bike has hand brakes put your hand on the brake lever and pull the brake lever towards the handle to increase the tension on the tire which will cause the bike to slow or stop.
Option 1: If your bike has hand brakes put your hand on the brake lever and push the brake lever away from the handle to increase the tension on the tire which will cause the bike to slow or stop.
Answer: 0