BK-S2 All-Terrain Trekking E-Bike
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Pre-order Items: Shipping on September 10
Smooth Power, Better Control
The Bafang M430 mid-drive system delivers up to 140Nm of torque through the drivetrain, helping with starts, inclines and loaded rides. A torque sensor measures your pedalling effort and adjusts assistance accordingly, creating a smoother and more intuitive riding experience across city streets, suburban routes and mixed terrain.
720Wh for Longer Riding Days
The removable 720Wh LG battery provides the flexibility for daily commuting and longer leisure rides, with up to 175km of range under suitable conditions. When it is time to recharge, the supplied 7.5A charger helps reduce waiting time. The removable design also makes charging more convenient when indoor bike storage is not available.
Comfort Beyond Smooth Cycle Paths
A 100mm adjustable air fork helps absorb broken surfaces, cobbles and gravel sections without making the BK-S2 feel unnecessarily cumbersome on smoother routes. Kenda 27.5 × 2.20-inch tyres add puncture protection and reflective sidewalls, while the adjustable dropper seatpost gives riders more control over their position as conditions change.
Hydraulic Control When It Matters
Tektro hydraulic disc brakes with 180mm rotors provide progressive, predictable braking for urban traffic, wet surfaces and downhill sections. Combined with the stable tyre profile and responsive mid-drive system, they help create a bike that feels composed across changing everyday conditions rather than being optimised for just one type of road.
One Bike for More of Your Week
The step-through frame makes frequent stops and starts easier, while the rear rack adds practical carrying capacity for bags and everyday errands. Add the removable battery, integrated light, TFT display, app connectivity, NFC access and 150kg maximum load capacity, and the BK-S2 becomes equally relevant for commuting, errands and weekend exploration.
More Riding. Less Waiting.
A 720Wh LG battery with BMS gives the BK-S2 the capacity for long commutes and weekend exploration, with up to 175km available under suitable conditions. The supplied 7.5A charger then tackles the other side of range anxiety: waiting. Around 1.5–2 hours of charging gets you ready to ride again much sooner.
Power Where It Feels Most Natural
The Bafang M430 mid-drive motor delivers assistance through the drivetrain for smoother starts, stronger climbing support and more controlled power delivery. With up to 140Nm of torque, it is especially useful on hills, loaded rides and mixed-terrain routes.
Assistance That Responds to You
The torque sensor measures how hard you pedal and adjusts motor support accordingly. The result is a smoother, more intuitive ride that feels natural in traffic, on climbs and when changing pace.
Comfort Beyond Perfect Roads
Not every daily route is a smooth cycle path. The adjustable 100mm air fork helps isolate the rider from broken asphalt, cobbles and gravel, while lockout allows a firmer front end when the surface becomes smoother. It gives the BK-S2 versatility without turning it into an unnecessarily aggressive mountain bike.
More Control When Braking Matters
Tektro hydraulic disc brakes with 180mm rotors provide progressive and predictable braking. They make it easier to control speed on descents, in traffic and on wet or uneven roads.
Diamond Frame — Stable by Design
The diamond-frame geometry provides a solid, composed riding platform for commuting, longer tours and mixed-terrain routes. Its traditional high-step construction complements the mid-drive system with a confident, planted feel, particularly when climbing or riding with additional load.
Features and Details
Dropper Seatpost
The dropper seatpost lets you lower or raise the saddle more quickly when riding conditions change. It is useful for easier stops, uneven terrain and riders who want more flexibility in their riding position.
Integrated Front Light
The integrated front light improves forward visibility and helps you remain more visible to other road users during early-morning, evening and low-light rides.
Rear Cargo Rack
The integrated rear rack adds practical carrying capacity for panniers, shopping bags or daily essentials, making the BK-S2 more useful for commuting and errands as well as leisure rides.
27.5" x 2.2" Puncture-Resistant Tires
Kenda 27.5 × 2.20-inch tyres provide a balanced mix of stability, rolling efficiency and comfort. Puncture protection and reflective sidewalls add extra practicality for everyday riding.
Shimano 7-Speed Transmission
The Shimano 7-speed drivetrain gives you enough gear range to adapt your pedalling to flats, gentle climbs and changing road conditions without adding unnecessary complexity.
Rear Light
The rear light helps improve visibility to traffic approaching from behind, adding useful reassurance for commuting and riding in lower-light conditions.
Motor Torque
Nm
Maximum Load
kg
Motor Torque
Nm
Maximum Load
kg
Mileage
- km
Battery
V Ah
Waterproof Rating
IPX
What's in the package?
Ebike x 1
Manual x 1
NFC Card x 2
Bicycle Pump x 1
Lock x 1
7.5A Charger x 1
Installation Tools x 1
Key x 2
Specifications
Technical Specifications
- Motor Bafang M430 Mid-drive Motor (250W)
- Sensor Torque Sensor
- Battery 48V 15Ah Lithium-ion
- Charger 7.5A Fast Charger (2 Hours Charging Time)
- Display TFT Smart Display
- Maximum Speed 25 km/h
- Max Range 175km
- Climbing Angle 25 Degrees
- Pedal Assist 5-Level PAS
- Transmission Shimano 7-Speed Gear System
- Braking System Tektro Hydraulic Disc Brakes
- Suspension Lockable Front Suspension Fork
- Tires 27.5" x 2.2" Puncture-resistant Pneumatic Tires
- Frame Material Durable Aluminum Alloy
- Net Weight 27.35 kg
- Max Payload 150 kg
- Waterproof Rate IPX5
- Torque 140Nm
Geometry
- A Total Length 185 cm
- B Handlebar Height 111 cm
- C Wheelbase 118cm
- D Standover Height 85-95 cm
- E Top Tube Length 60 cm
- G Handlebar Length 72 cm
- Rider height 170-190 cm
FAQ
How quickly does it charge?
The supplied 7.5A charger is specified for approximately 1.5–2 hours of charging under the stated conditions. Actual charging time can vary depending on remaining charge, battery temperature and charging conditions.
Who is the BK-S2 for?
It suits riders looking for one e-bike for commuting, leisure riding, longer weekend routes and mixed surfaces.
Will I really get 175km?
175km is the maximum stated range under suitable riding conditions, not a guaranteed range for every journey. Rider weight, assistance level, gradients, temperature, tyre pressure, wind and luggage can all affect real-world range. Higher assistance and hilly riding will reduce it.