Bicycle exhaust system that fixes to the back of a pedal bike & makes realistic engine noises. The exhaust pipe attaches to the rear frame of most bicycles with a mounting bracket & tools included in the set. Once in place a plastic sound card can be between the base of the exhaust & the spokes of the rear wheel. As the bike moves the teeth on the sound card catch on the spokes, creating a sound that travels up the exhaust pipe to create a loud, realistic motorbike noise. Each Turbospoke comes with three sound cards which are tuneable for up to six different bike sounds. This innovative bicycle accessory is a new take on a classic & makes a great gift line for children of all ages.