Description Mongoose Supergoose 20″ Black frame with red trim. The Mongoose Supergoose rides again! Inspired by the 1984 Supergoose BMX bike, this iconic ride is perfect for the Classic Mongoose connoisseur, 20″ wheels fits riders 48 to 60 inches tall. 4130 Chromoly Supergoose loop-tail frame provides durability. Retro-style top tube pad completes the rad ’80’s look. Single speed drivetrain is simple to use and easy to maintain. DiaCompe MX brake kit delivers super-fast, reliable stopping power.  Unqiue Mongoose Pro Class drilled aluminum rims offer superior performance without weighing you down.