Tern BYB S11

Name: Tern BYB S11
Brand: Tern

2026 UrbanCommuterFolding Manufacturer page

Last known price: $2,499

Prices shown first for United States
Suspension: Rigid
Wheels: 20″
Drivetrain: 1 × 11 54t / 11–32t
Gear range: 291%
Weight: 12.7 kg 28.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Rim brake

Not published by the manufacturer

Sizes and geometry

Components

17 of 22 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Tern BYB, Aluminum, TriFold patented technology, EFBE tested: ISO 4210 Not identified

Suspension

1 part

Fork
- Tern

Drivetrain

8 parts

Bottom bracket
- FSA
BB-EVO8681
Cassette
- Shimano 105 11–32t
Chain
- Shimano
Chain guide
- Hebie
Crankset
- FSA Gossamer 54t
Front derailleur

None
Rear derailleur
- Shimano 105
Shifters
- Shimano 105

Brakes

2 parts

Brake levers
- Shimano
Brakes
- Tektro

Wheels and tires

2 parts

Cockpit and contact points

6 parts

Handlebar
- Kinetix
Headset

Flux Pro, angular contact bearings, Physis integrated Not identified
Pedals

MKS UB-LITE EZY Not identified
Saddle
- Ergon
Seatpost
- Tern
Stem
- Tern

Other components

3 parts

Bell

Pitch, brass Not identified
Fenders
- SKS
Racks

Combo Mount Not identified

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Aluminum
Bicycle weight: 12.7 kg

28.0 lb
Weight limit: 120 kg

264.6 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 54
Largest chainring: 54
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 32
Lowest gear: 33.8 in
Highest gear: 98.2 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Wheel material: Aluminum
Wheel size: 20″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 12.9 km/h
Highest gear: 37.6 km/h

Total gear range 291%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 33.8–98.2 gear inches

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2026 builds
Specification	This bicycle Tern BYB S11	Tern BYB P10	Tern BYB P8
Frame
Bicycle weight	12.7 kg	12 kg	14.3 kg
Drivetrain
Smallest chainring	54	53	52
Largest chainring	54	53	52
Rear sprockets	11	10	8
Largest sprocket	32	36	32
Lowest gear	33.8 in	29.4 in	32.5 in
Highest gear	98.2 in	96.4 in	94.6 in