What makes it a Vektron P5i?
- Powerful Bosch BES2 Performance motor provides up to 65 Nm of torque and 300% support
- Intuitive, easy-to-read Intuvia display keeps you informed and in control on the road
- PowerPack 400 battery lets you ride up to 112 km (70 mi) on a single charge
- Shimano Nexus 5 internally geared hub with 263% gear range and twist shifter offers smooth, effortless shifting across changing terrain
- Silent, grease-free, and low-maintenance Gates Belt Drive
- ABUS frame lock, conveniently keyed alike with the battery
Vektron highlights
- Best-in-class Bosch drivetrain ensures efficient, comfortable, and natural-feeling pedal assist
- Stiff frame & dialed-in geometry guarantees a ride that outshines many full-sized bikes
- Folds down compact in 10 seconds to fit in cars, trains, and closets
- Stands upright and rolls when folded—easy to move, easy to store
- Adjustable cockpit resizes in seconds to comfortably fit riders 147 - 195 cm (4’10” - 6’5”)
- Hydraulic disc brakes for all-weather stopping power
- Atlas V Rear Rack with 27 kg load capacity, compatible with KLICKfix, Racktime SNAPIT 2.0, and Ortlieb Quick-Lock 2.1 & 2.2 systems
- UL 2849-certified Bosch battery/motor system & third-party tested in compliance with EN 15194, meeting strict eBike safety standards
Component Specifications
Sourced from Tern's published specifications for the Vektron P5i (Gen 4). Tern builds the Vektron in one universal frame size.
Frame & Build
| Frame | Tern Vektron, 6061-AL hydroformed aluminum, OCL+ joint (3 patented technologies) |
| Fork | Tern Tarsus, 6061-AL, hydroformed |
| Frame Lock | ABUS, keyed alike with the battery |
| Frame Size | One size, fits riders 147–195 cm (4′10″–6′5″) |
| Weight | 23.9 kg (52.7 lb) |
| Max Gross Vehicle Weight | 125 kg (275.6 lb) |
| Max Rider Weight | 105 kg (231.5 lb) |
Motor & Battery
| Motor | Bosch BES2 Performance — 65 Nm torque, 300% support, max assisted speed 20 mph (28 km/h) |
| Battery | Bosch PowerPack, 400 Wh |
| Range | 45–112 km (28–70 mi) |
| Display | Bosch Intuvia |
| Charger | 100–120V, 4A |
Drivetrain
| Shifter | Shimano Nexus, 5-speed twist shifter |
| Hub | Shimano Nexus 5, internally geared (263% gear range) |
| Belt Drive | Gates Carbon Drive CDC belt |
| Crankset | Tern custom, Gates CDX CNC-machined beltring |
| Cog | Gates CDX, precision CNC-machined |
| Pedals | MKS EZY |
| Gear Range | 34″ – 90″ (2.75 – 7.22 m), 1 x 5 speeds |
Brakes
| Front Brake | Magura MT4, hydraulic disc |
| Rear Brake | Magura MT4, hydraulic disc |
Wheels & Tires
| Wheel Size | 20-inch (406 mm) |
| Rims | Kinetix Comp, for disc |
| Tires | Schwalbe Big Apple, Performance Line, 55-406, puncture protection, Reflex |
Cockpit
| Handlepost | Tern Physis 3D, 3D forged, 12°, 350 mm |
| Stem | Tern Andros, adjustable, forged construction |
| Handlebar | Tern Sweep, 6061-AL, Andros adapted |
| Grips | Ergon |
| Saddle | Tern Upright by Velo |
| Seatpost | Tern Telescope, 34.9/30.9 mm |
Folded Dimensions
| Folded Size (L x W x H) | 42 x 85 x 69 cm (16.5 x 33.5 x 27.2 in) |
| Folding Time | 10 seconds |
Geometry
The Vektron P5i is built in a single universal frame size with an adjustable cockpit rather than multiple frame sizes. Tern does not publish a stack/reach/tube-angle geometry chart for this model — folded dimensions and rider height range above are the published fit data.
