Tern BYB S11 2023 - Folding Bike
Cars, buses, trains. Shops, escalators, elevators. Lockers, cabinets, checked-in luggage.
The BYB lets you bring you bike just about everywhere.
The facts:
- 35% smaller than traditional 20" Tern folding bikes
- Fits conveniently into lockers, closets, or any narrow space
- Metro Transit Rack with built-in spinner wheels for easier trolleying
- 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
Gear Inches / Metres of Development: 32" - 94" (2.57 - 7.48 m)
Folded Dimensions: 33 x 81 x 51 cm (13.0" x 31.9" x 20.1")
Max Load Weight (Rider & Cargo): 105 kg (231 lb)
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | Tern BYB, Aluminium, TriFold Patented Technology, EFBE Tested: ISO 4210 |
| Fork | Tarsus, 6061-AL, hydroformed |
| Headset | Flux Pro, angular contact bearings, Physis integrated |
| Stem | Tern Andros (G2), adjustable, forged construction, patented technology |
| Bars | Physis RF, 3D forged, 5 Patented Technologies |
| Front Brake | Tektro V, Swivel Link, Race Pad |
| Rear Brake | Tektro V, Swivel Link, Race Pad |
| Brake Lever | SHIMANO |
| Rear Mech | Shimano Ultegra, Shadow |
| Shifters | Shimano Ultegra, 1 x 11 spd |
| Speed | 11 |
| Rims | Kinetix Pro X |
| Front Hub | Paired Spoke technology, straight-pull design, 16H |
| Rear Hub | Paired Spoke technology, straight-pull design, 16H |
| Front Tyre | Kinetix Pro X, Paired Spoke Technology, Straight-Pull Design, 16H |
| Rear Tyre | Kinetix Pro X, Paired Spoke Technology, Straight-Pull Design, 16H |
| Seat Post | Telescope, 34.9/30.9 mm, 2014-AL |
| Saddle | Ergon SMC30 Pro, TiNox Rails |
| Chainset | FSA Gossamer Pro, 54T MegaEVO BB386 |
| Bottom Bracket | FSA, BB-EVO8681 |
| Chain | Shimano, 11 spd |
| Cassette | Shimano 105, 11-32T |
| Pedals | MKS UB-LITE EZY |
| Weight | 12.7 kg |
Folding Bike size guide
Folding bikes are made to a “one size fits all” size.
Generally speaking, this should suit riders between 4’9” and 6’3” (145 to 191cm)
Brompton bikes sizing
Brompton size by inside leag measurement, they offer different seatpost lengths to suit. There are three different seatpost options.
Standard Seatpost – Inside leg measurement up to 33”
Extended Seatpost – Inside leg measurement of 33” – 35”
Telescopic Seatpost – Inside leg measurement greater than 35”
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