Tern Vektron P5i (Gen 4)

$3,899.00 $4,099.00
by Tern
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Ride it, Fold it, Go Further. The Vektron is a best-in-class electric bike that folds in 10 seconds to go on trains, in cars, and under desks. Shorten distances and flatten the hills on your commute, or put a couple of Vektrons in the trunk of your car on your next trip, so you can explore further. With an updated frame, upgraded Bosch motors, and a wide ecosystem of accessories to help you carry your stuff, the Vektron will easily turn a lot of your car trips into bike trips. The Vektron has a low-step frame design and resizes in seconds—no tools required—to fit riders between 4'10" – 6'5", so you can share the bike with anyone in your family.

- Upgraded to the Bosch Performance electric drivetrain for 300% more assistance and 65 Nm of torque
- Updated frame with a reclining battery for a lower center of gravity and a better ride
- Frame passed strict European safety standards for pedal-assist e-bikes, having been certified as EN15194-compliant by EFBE Prüftechnik
- Integrated Atlas Rack works seamlessly with Thule Yepp Maxi and Nexxt Maxi child seats—no adapters needed

Size/Weight
- Distance: Seatpost To Handlebar: Min: 620 mm (24.4") Max: 690 mm (27.2")
- Distance: Saddle To Pedal: Min: 670 mm (26.4") Max: 1100 mm (43.3")
- Suggested Rider Height: 147 - 195 cm (4'10" - 6'5")
- Max Load Weight: 105 kg (230lb)
- Max Gross Vehicle Weight: 125 kg (275lb)
- Max Rider Weight: 105 kg (230lb)

Frame Tern Vektron, hydroformed 7005-AL, OCL+ joint, 3 patented technologies
Fork Tern Tarsus, 6061-Al, hydroformed
Rims Kinetix Comp, for disc
Hubs
Shimano Nexus 5, Sealed Front
Spokes Stainless steel, double-butted
Tires Schwalbe Big Apple, Performance Line, 55-406, puncture protection, Reflex
Crankset Vektron custom, forged 6061-AL crankarm
Shifters Shimano Nexus Grip Shift
Rear Derailleur N/A
Cassette/Freewheel
Gates CDX, precision CNC machined cog
Belt Drive Gates Carbon Belt Drive
Brakes Magura MT4, hydraulic disc
Brake Levers Magura, hydraulic disc
Handlebars Kinetix Comp, double-butted 6061-AL, Tern Andros adapted
Tape/Grips Ergon
Stem Tern Andros, adjustable, forged construction, patented technology
Headset Flux Pro, angular contact bearings, Physis integrated
Seatpost Tern Telescope, 34.9/30.9 mm, 2014-AL
Saddle Tern Porter+, patented GripPad design, PrimeGel padding
Pedals MKS EZY
Accessories & Extras BELL: Aluminum
CHAINGUARD: SKS Chainblade
KICKSTAND: URSUS, rear mount
CLIP SYSTEM: Magnetix 3.0
LUGGAGE SOCKET: Yes
FRONT LIGHT: Tern Valo Direct, 190 lumens
REAR LIGHT: Herrmans H-Trace, for eBike
FENDERS: SKS, stainless hardware
RACK(S): Atlas Rack, integrated 8 point mounting
Motor Bosch Performance, 300% Assist, 65 Nm Torque
Battery Bosch PowerPack 400 Wh
Controller/Display Bosch Purion, 4 mode selectable, walk assist
Charger Bosch 100-240V, 4A Charger

How do you know what size of bike you should buy?

A good place to start is using the sizing charts included for each bike on the info page. If you're in the middle of the recommended height range for a specific size then usually that's the correct one to go with. If you find yourself overlapping sizes at either the top or bottom of the height recommendation than sizing up or down could be a consideration.

For more relaxed fitting "city-style" bikes sizing is less crucial because often they will have adjustable stems and offer more overlap in sizing. Smaller bikes will be slightly easier to manage when starting and stopping while larger bikes will feel more stable when riding. Most often we recommend sizing down in this category.

Bikes that have a more aggressive riding position i.e. road, gravel and mountain bikes sizing is more important. In these categories we usually look closely at 3 numbers, reach, stack, and top-tube length.

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