Cyclists are pretty bad-ass, considering the amount of pedaling they need to put in to get from one place to the other. An attachment of sorts that will add more bad-asserie to their bikes is the Turbospoke bicycle exhaust system. It was designed to look like a motorcycle exhaust and it even makes motor sounds as the cyclist pedals along.
Turbospoke’s set-up involves using waterproof cards that clap on the bike’s spokes every time the wheel turns. As a result, that distinct motor sound is produced, which is then amplified by the hollow exhaust tube.