FiftyOne Assassin

What is it?

The Assassin is a progressive gravel bike designed for extreme conditions and everything in between. Its adjustable geometry allows you to customise the ride to suit your style without compromising on performance. Light, responsive, and incredibly comfortable, it is equipped to handle whatever demands your gravel riding presents.

Who is it for?

The Assassin is ideal for explorers, racers, bikepackers, trail riders, and even commuters, anyone eager to venture off the beaten path and discover where it leads.
With exceptional compatibility and geometry that adapts to your needs, the Assassin offers outstanding performance in every scenario.

Why did we make it?

Gravel riding deserves better options. Drawing on years of custom bike expertise, we aimed to create a frame that adapts to the rider and the conditions rather than
forcing the rider to adjust to the bike. Confident handling is what every rider desires, but the geometry that achieves this varies for each individual and the terrain they navigate.

Key Features

Adjustable geometry

The front and rear flip chips allow you to adjust the head angle, trail, and chainstay length to suit your terrain, tires, and riding style. The frame, made from a 1050g Toray T1100/T800/T700 layup, is lightweight,
strong, and responsive for long rough days in the saddle and everything in between.

Tyre clearance

With 47 mm of clearance for both 700c and 650B wheels, the Assassin can handle everything from fast gravel roads to rough trails. You can run lower tire pressures to enhance grip and comfort without sacrificing steering responsiveness.

Drivetrain options

Choose between a 1x or 2x drivetrain, Sram, Shimano or Campagnolo, with gearing options up to 50/34, to accommodate racing, bikepacking, or anything in between.

Compatibility

This bike is compatible with dropper posts and Di2, featuring clean internal routing. Additionally, integrated front dynamo routing keeps your lighting and device power organised for those big sends.

Mounts and carrying capacity

The Assassin is equipped with various mounts. It includes fender and rack mounts, two bottle mounts, and four additional mounts on the top tube, down tube, and fork legs for bags, accessories, or extra bottles. The rated capacities are: rear rack 15 kg, front rack 5 kg, and fork-leg mounts 5 kg each.

Paint options

Choose from mild, wild, or fully custom paint options. Available colors include Desert Storm, Black Ops, Avoca Grey, Rothmans Blue, British Racing Green, Jet Fuel, or you can create your own custom design. To inquire about custom painting for your Assassin, please contact us.

Flip Chips Explained

The Assassin’s flip chips let you set handling to your terrain and confidence. Rider preferences vary, and gravel varies even more, so one setting does not fit all. The Assassin is our first custom-building experience distilled into a factory frame.

At the rear, two chips provide three axle positions, allowing for changes in effective chainstay length and overall wheelbase in 5 mm increments. Go shorter for increased agility, longer for added stability, or opt for a middle position for a balanced feel.

At the front, the chips offer two positions. Low offers a slacker head angle and longer trail for more demanding terrain, typically with tyres ≥ 45 mm. High offers a steeper head angle and shorter trail for fast gravel and back roads, typically with tyres ≤ 38 mm.

Flip Chips Explained

Quick guide

Long + Low: rugged terrain, more MTB feel, usually ≥ 45 mm tyres

Short + High: milder gravel, more road-bike feel, usually ≤ 40 mm tyres

• Mix and match to find your sweet spot or leave it on your preferred setting and forget about it whilst incurring no weight penalty.

Carbon Layup

We had a clear vision for how we wanted the Assassin to ride, and our custom experience showed us how to get there.

Using Toray T1100, T800 and T700
fibres in a precise layup, the result is a gravel frame that weighs
just 1050 g, rewards your effort like a great road bike and keeps you
moving when rides are measured in days, not hours.

Size Chart & Geometry Guide

Place an order with us

Drop us a note using this form if you are looking to purchase this model.

As this model is customizable, we will contact you to discuss in greater detail on available options and finish.

Alternatively, you can email us at enquiries@bikesnbites.com