Tern BYB
Small Fold, Slim Fit
The BYB isn’t just a folding bike—it’s a whole new way to fold a bike. It’s 30% smaller than traditional 20” folding bikes, and folds small and slim enough to fit conveniently into lockers, closets, or any narrow space.
Smaller Footprint
When folded, the BYB has one of the smallest footprints of any folding bike. That means a much easier time maneuvering it onto crowded trains and buses or when navigating through busy subway stations.
Ready to Roll
Ever tried to ride on public transport with a folding bike and felt like you needed an extra pair of hands? The BYB stands on its rack, and its built-in spinner wheels let you trolley the bike with one hand while the other holds your coffee.
Why The BYB?
TriFold Technology
TriFold technology is a patented new way to fold a bike small while delivering a quality ride.
TFL Joint
With an organically curved form optimized for strength, the TFL Joint is our most advanced yet and includes a number of critical new technologies.
Physis RF
Next to the frame, the Physis RF—our new 3D-forged handlepost—is the most important component contributing to the BYB’s stiff and responsive ride.
Andros Stem
The Andros is our tool-free adjustable stem – it lets you adjust your riding position by setting your handlebars exactly where you want.
Metro Transit Rack
Roll the BYB like a spinner suitcase and easily maneuver the bike in crowded rail or bus stations. The Metro Transit Rack carries up to 20 kg (44 lb) and allows the BYB to stand vertically.
Anchor Bolt
Securely locks the sections of the BYB together when rolling or carrying the bike. Depress the lever and the clever release mechanism ejects the Anchor Bolt, making it easier to unfold.
DoubleDeck Frame
The BYB inherits important technology—DoubleDeck frame design and the burly trapezoidal tubing—from the Tern GSD, ensuring extra stiffness and durability.
Combo Mount
The same robust mount found on our cargo-focused GSD. The Combo Mount lets you install a variety of different racks, bags, and baskets to your BYB so you can also bring your stuff.
Kinetix Pro X Wheels
Light, fast, and strong, Kinetix Pro X Wheels are built with custom hubs and straight-pull Sapim aero spokes in a paired-spoke pattern.
BYB P8
BYB S11