Based in Dublin, Ireland, FiftyOne Bikes is a manufacturer of hand-built custom road bikes and factory-built gravel bikes. Every bike is made to our exacting standards and designed to the especially textured understanding we have of the needs of each individual rider.
The Assassin is a progressive gravel bike with a massive breadth of ability. Its adjustable geometry creates capability in place of compromise, allowing you to tailor the handling to how you ride. It’s exceptionally light, responsive and comfortable. In short, Assassin is the answer, whatever question your gravel riding asks.
Handcrafted carbon fibre bikes fitted to you, designed by you and built for you. Crafted in Ireland by our master frame builder, using the highest quality carbon fibre. FiftyOne will draw out, from your soul, your dream bike and make it a reality.
FiftyOne Bikes was founded in 2016 by former international rider Aidan Duff, in response to the disappearance from top-end race bikes of the custom options that he had always enjoyed during his career.