Skip to main content

Tern BYB P8

Tern BYB P8
This item is currently not available.


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. 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.

The BYB delivers with a frame engineered for stiffness, larger 20" wheels, and performance components for mixed-mode commuters who do a stretch of their daily journey on a train or bus and demand convenience AND performance. It also has a low-step frame design and resizes in seconds—no tools required—to fit riders between 147 and 195 cm (4'10" – 6'5"), so you can share the bike with anyone in your family.

- 30% smaller than traditional 20” folding bikes
- Fits conveniently into lockers, closets, or any narrow space
- Metro Transit Rack with built-in spinner wheels for easier trolleying
- Fits riders from 4'10" – 6'5"
- New TFL Joint with 3D interface, DeadBolt design and SpringLock technology
- New 3D-forged Physis RF Handlepost
- Tern Porter saddle with patented GripPad design
- 8-speed Shimano Acera, Shadow RD derailleur

- BELL: Pitch, brass
- KICKSTAND: Deluxe center mount
- CLIP SYSTEM: AnchorBolt
- FRONT LIGHT: Opt: Tern Valo 2, integrated, 41 lux/150 lumens
- REAR LIGHT: Opt: Deluxe LED
- FENDERS: SKS, stainless hardware
- RACK(S): Tern Metro Transit Rack
- ACCESSORY: Pedal Holder

WARNING: This product can expose you to chemicals which are known to the state of California to cause cancer and birth defects or other reproductive harm. For more information, go to


Frame Tern BYB, Aluminum, TriFold patented technology, EFBE tested: ISO 4210
Fork Tern Tarsus, 6061-AL, hydroformed
Headset Flux, cartridge bearings, Physis integrated
Rims/Wheels Doublewall aluminum
Hubs Front: Kinetix Neutron Mini 74, sealed cartridge bearing Opt: BioLogic Joule 3 dynamo
Rear: Novatec, sealed cartridge bearing
Spokes Stainless steel
Tires Schwalbe Citizen, 42-406, puncture protection, Reflex
Crankset Forged 6061-AL
Chainrings 52T
Bottom Bracket FSA, Cartridge, sealed bearings
Chain KMC, 8 spd
Rear Derailleur Shimano Acera, Shadow RD
Cassette/Rear Cogs Shimano 11-32T, 8 spd
Shifters Shimano, 1 x 8 spd
Handlebars Flat bar, 6061-AL, Andros adapted
Tape/Grips Velo ergonomic, lock-on
Stem Tern Andros (G2), adjustable, forged construction, patented technology
Brake Levers Shimano
Brakes Kinetix SpeedStop V-brakes, stainless hardware
Pedals MKS EZY
Saddle Tern Porter, patented GripPad design
Seat Post Tern Telescope, 34.9/30.9mm, 2014-AL
Folded Dimensions 13.8" x 31.9" x 20.5"

* Subject to change without notice.