Mongoose PT20 Pump track, BMX Bike, Single speed, 20-" Wheels, Freestyle BMX Bike Take the pump track by storm with the PT20 BMX bike by Mongoose. Perfect for young riders who want to build their pump track skills, the PT20s durable steel frame features an oversized head tube and handlebars for great durability and handling. Large 2.25-inch-wide tires on performance double-wall aluminum rims deliver durability and grip so you can ride with confidence. The single-speed drivetrain is easy to use and maintain, while the powerful rear disc brake delivers superior stopping power and speed control in all weather conditions. There are rad times ahead, my friend. Get ready to shred it with the PT20 BMX bike by Mongoose.