Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Tern
2020 Tern BYB S11
Previous used estimate
$947 - $974
Actual value depends on condition, size, and local demand.
Value Guide market data · 2020 Tern BYB S11
12-month projected trend
10%
Direction and magnitude, not judgment
vs. category average
2%
Drops faster than category avg
Price over time - 2020 Tern BYB S11
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All BYB model years
Compare BYB S11 models
1 modelsChoose a different build or frame style to see its value.
Overview
About this bike
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 BELLS & WHISTLES - BELL: Pitch, brass - CHAINGUARD: Hebie - KICKSTAND: Premium center mount - CLIP SYSTEM: AnchorBolt - LUGGAGE SOCKET: Yes - FENDERS: SKS, stainless hardware - RACK(S): Tern Metro Transit Rack - ACCESSORY: Pedal Holder
Specifications
- Subtype
- Fitness & Hybrid
- Category
- Hybrid
- Component Fork
- Tern Tarsus, 6061-AL, hydroformed
- Component Size
- One Size
- Component Stem
- Tern Andros (G2), adjustable, forged construction, patented technology
- Product Family
- BYB
- Component Chain
- Shimano, 11 spd
- Component Color
- Silver
- Component Frame
- Tern BYB, Aluminum, TriFold patented technology, EFBE tested: ISO 4210
- Component Brakes
- Tektro V, swivel link, race pad
- Component Pedals
- MKS UB-LITE EZY
- Component Saddle
- Ergon SMC30 Pro, TiNox Rails
- Component Headset
- Flux Pro, angular contact bearings, Physis integrated
- Component Cassette
- Shimano 105, 11-32T
- Component Crankset
- Crankset, FSA Gossamer Pro, MegaEVO BB386
- Component Shifters
- Shimano Ultegra, 1 x 11 spd
- Component Handlebar
- Kinetix Pro X, double-butted 7050-AL, Andros adapted
- Component Seat Post
- Tern Telescope, 34.9/30.9mm, 2014-AL
- Component Chainrings
- 54T
- Component Front Tire
- Schwalbe Marathon Racer, 40-406, puncture protection, Reflex
- Component Tape Grips
- Ergon GS1 Leichtbau
- Component Brake Levers
- Shimano
- Component Bottom Bracket
- FSA, BB-EVO8681
- Component Rear Derailleur
- Shimano Ultegra, Shadow RD
- Component Folded Dimensions
- 13.0" x 31.9" x 20."
- Crankset
- Crankset, FSA Gossamer Pro, MegaEVO BB386
- Pedals
- MKS UB-LITE EZY
- Bottom Bracket
- FSA, BB-EVO8681
- Chain
- Shimano, 11 spd
- Saddle
- Ergon SMC30 Pro, TiNox Rails
- Handlebar
- Kinetix Pro X, double-butted 7050-AL, Andros adapted
- Headset
- Flux Pro, angular contact bearings, Physis integrated
- Rear Derailleur
- Shimano Ultegra, Shadow RD
- Stem
- Tern Andros (G2), adjustable, forged construction, patented technology
- Brake Levers
- Shimano
- Brakes
- Tektro V, swivel link, race pad
- Cassette
- Shimano 105, 11-32T
- Chainrings
- 54T
- Folded Dimensions
- 13.0" x 31.9" x 20."
- Fork
- Tern Tarsus, 6061-AL, hydroformed
- Frame
- Tern BYB, Aluminum, TriFold patented technology, EFBE tested: ISO 4210
- Seat Post
- Tern Telescope, 34.9/30.9mm, 2014-AL
- Shifters
- Shimano Ultegra, 1 x 11 spd
- Tape/Grips
- Ergon GS1 Leichtbau
- Color
- Silver
- Size
- One Size
- Front Tire
- Schwalbe Marathon Racer, 40-406, puncture protection, Reflex
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.