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Tern BYB S11

Tern BYB S11
  • Color: Silver
Color: Silver
Size: One Size
Please select options Unavailable
Sorry, this item is currently not available. Please call 212-794-2929 for availability.


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
- Kinetix Pro X wheels with paired spoke technology
- 11-speed Shimano Ultegra, Shadow RD derailleur

- BELL: Pitch, brass
- KICKSTAND: Premium center mount
- CLIP SYSTEM: AnchorBolt
- FENDERS: SKS, stainless hardware
- RACK(S): Tern Metro Transit Rack
- ACCESSORY: Pedal Holder

WARNING: This product can expose you to chemicals including 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 Pro, angular contact bearings, Physis integrated
Rims/Wheels Kinetix Pro X, Paired Spoke technology, straight-pull design, 16H
Tires Schwalbe Marathon Racer, 40-406, puncture protection, Reflex
Crankset Crankset, FSA Gossamer Pro, MegaEVO BB386
Chainrings 54T
Bottom Bracket FSA, BB-EVO8681
Chain Shimano, 11 spd
Rear Derailleur Shimano Ultegra, Shadow RD
Cassette/Rear Cogs Shimano 105, 11-32T
Shifters Shimano Ultegra, 1 x 11 spd
Handlebars Kinetix Pro X, double-butted 7050-AL, Andros adapted
Tape/Grips Ergon GS1 Leichtbau
Stem Tern Andros (G2), adjustable, forged construction, patented technology
Brake Levers Shimano
Brakes Tektro V, swivel link, race pad
Saddle Ergon SMC30 Pro, TiNox Rails
Seat Post Tern Telescope, 34.9/30.9mm, 2014-AL
Folded Dimensions 13.0" x 31.9" x 20."

* Subject to change without notice.

Part Numbers

Option UPC MPN
Silver / One Size 812741022933 12-7-10