Are you looking for something unique? Fed up with off-the-peg options? Thinking about a quirky build that nobody offers? 

A custom bike build offers a truly tailored experience — designed to perfectly match your riding style and budget.

Welcome to FiftyOne Bikes. 

Pricing

About

Based in Dublin, Ireland, FiftyOne Bikes is a manufacturer of hand-built custom road bikes and factory-built gravel & road 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.

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.

What is it?

The Sika is a cutting-edge road bike that delivers top-level
performance in a package tailored for real riders, not for pros. It combines feathery
lightness, high stiffness and sleek aero with a less extreme position, confident
handling, and clearance for 40mm tyres. It’s the ride of your life, all day long.

Who is it for?

Road riders who want to ride all day in comfort on a mix of roads
while enjoying top-tier performance, but have grown tired of the limitations and
fussiness of bikes designed purely for racing. Common sense was a key ingredient.

Why did we make it?

Because we could see something missing from modern
road bikes and felt that we could deliver it by drawing on our vast experience of
building custom bikes. We understand that many riders want a superlight, fast,
confident bike that can take bigger tyres and has a real-world stack height.

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.