E-Bikes

ENGWE O20 Boost 20-Inch Folding E-Bike – 720 Wh, 75 Nm, Pedelec, Graphite Grey

The foldable e-bike that redefines range, comfort and everyday practicality.

⚡ 250 W hub motor · 75 Nm boost
🔋 720 Wh · up to 140 km range
🛡️ Hydraulic front suspension
🧩 Compact and foldable
✅ 25 km/h maximum assisted speed

The ENGWE O20 Boost combines a precise torque sensor with a unique boost function that delivers up to 75 Nm additional torque at the push of a button – ideal for steep climbs and full loads. The powerful 720 Wh battery (48 V, 15 Ah, LG cells) enables a range of up to 140 km in eco mode. Thanks to its compact 6061-aluminium folding frame, the O20 Boost stows and transports effortlessly, whilst hydraulic front suspension and hydraulic dual-piston disc brakes provide safe riding comfort on any route.

Who is it for?

For commuters and leisure riders seeking a powerful yet space-saving e-bike for the daily commute and longer trips – compact enough for the train, car or home office corner. Check the supplied configuration and current UK EAPC rules before road use.

At a Glance

Motor: 250 W (rated) · 75 Nm boost torque
Battery: 720 Wh (48 V, 15 Ah) · LG cells
Range: up to 140 km (eco mode, ideal conditions)
Top speed: 25 km/h (pedal assistance only; verify UK EAPC compliance before road use)
Frame: 6061-aluminium, foldable
Folded dimensions: approx. 850 × 650 × 450 mm
Weight: approx. 24 kg (with battery)
Wheels: 20-inch
Tyres: All-terrain, puncture-resistant
Front suspension: Hydraulic damping
Brakes: Hydraulic dual-piston disc brakes (front and rear)
Display: LCD, integrated into the stem
Gearing: Single-speed with internal hub (optional multi-speed available)
Saddle: Comfort saddle, height-adjustable
Pedals: Foldable
Charging time: approx. 5–6 hours (standard charger)
IP rating: IPx4 (water and splash-resistant)
Warranty: 2 years (frame and motor) · 1 year (battery)

UK Road-Use Information

In Great Britain, an e-bike is treated as an electrically assisted pedal cycle (EAPC) only when it meets all current legal requirements, including:

Maximum assisted speed: 25 km/h
Motor rating: max. 250 W continuous
Assistance only whilst pedalling
No throttle mode (pedelec only)

The rider must be at least 14. Only a confirmed compliant configuration can be used as an EAPC without registration, tax or insurance. Check the supplied configuration and current GOV.UK rules before road use.

Maintenance & Care

Clean the frame and components with a soft, damp cloth after each ride.
Check tyre pressure weekly (recommended: 50–65 psi for 20-inch tyres).
Lubricate the chain every 100 km or monthly.
Inspect hydraulic brake lines for leaks or damage.
Charge the battery at room temperature (15–25 °C) when the charge level drops below 20%.
Store indoors and away from extreme temperatures or prolonged sunlight.

FAQ

Q: Can I use the boost function continuously?
A: The boost function is designed for short bursts (climbing, acceleration). Continuous use may reduce motor lifespan and battery range. We recommend using boost sparingly for optimal performance.

Q: Is the battery removable?
A: Yes. The battery slides out from the downtube for charging indoors or carrying separately.

Q: What is the maximum rider weight?
A: Maximum combined weight (rider + cargo): 120 kg.

Q: Can I ride in the rain?
A: The O20 Boost has an IPx4 rating and is splash-resistant. Avoid submerging the motor or battery, and dry components after wet rides.

Q: How often should I service the bike?
A: Annual professional servicing is recommended, especially for hydraulic brakes and motor bearings. Check chain and tyres monthly.

Q: Can I replace the battery?
A: Yes. Replacement batteries (48 V, 15 Ah) are available as optional accessories. Battery lifespan is typically 2–3 years with proper care.

Q: Is the frame warranty transferable?
A: The 2-year frame warranty applies to the original owner only and is non-transferable.

Technical Specifications (Complete)

Motor type: Direct-drive hub motor (250 W rated)
Boost torque: 75 Nm (on-demand)
Battery chemistry: Lithium-ion (LG cells)
Battery capacity: 720 Wh (48 V, 15 Ah)
Charge cycles: approx. 800–1000 (80% capacity)
Motor efficiency: approx. 92 %
System voltage: 48 V DC
Assisted speed limit: 25 km/h (verify UK EAPC compliance before road use)
Range (mixed terrain): 80–140 km depending on rider weight, terrain, and assistance mode
Terrain: Urban, suburban, light trails
Gradient capability: up to 25 % (with boost)
Wheelbase: approx. 1050 mm
Ground clearance: approx. 120 mm
Seat height (adjustable): 750–900 mm
Handlebars: Adjustable height and angle
Pedal type: Platform (foldable)
Crank length: 170 mm
Bottom bracket: Sealed cartridge bearing
Chain: Single-speed, 1/2" × 3/32"
Sprocket: 16T (rear)
Tyre size: 20" × 1.95"
Tyre type: All-terrain, tube-type, puncture-resistant compound
Max tyre pressure: 65 psi
Rim material: Aluminium alloy
Spoke count: 24 (front and rear)
Hub (front): Sealed cartridge bearing
Hub (rear): Motor integrated
Brake type: Hydraulic disc (front and rear)
Brake rotor size: 160 mm (front), 140 mm (rear)
Brake pad material: Organic resin
Brake fluid: ISO 4925 DOT 4
Brake lever reach: Adjustable
Suspension (front): Hydraulic spring, 40 mm travel, adjustable preload
Suspension (rear): Rigid
Suspension material: Aluminium alloy lower legs
Damping: Oil-sealed hydraulic cartridge
Seat post diameter: 27.2 mm
Seat post length: 350 mm
Seat post offset: 0 mm
Seat tube angle: 72 °
Head tube angle: 70 °
Frame material: 6061-T6 aluminium alloy
Frame welds: TIG-welded, tested to EN 14765 (e-bike safety standard)
Paint finish: Powder coat, UV-resistant
Colour: Graphite Grey
Reflectors: Front, rear, and pedal (safety-certified)
Lights (optional): Mounting points for front and rear lights
Display: Integrated LCD in stem
Display functions: Battery level, speed, distance, trip distance, range estimate, assistance mode, error codes
Buttons: Mode selector (5 levels), boost button
Connectivity: None (non-wireless model)
Cable management: Internal routing through frame
Derailleur: N/A (single-speed)
Shifter: N/A (single-speed)
Bottom bracket protection: Skid plate (optional add-on)
Kickstand: Side-stand (recommended add-on)
Mudguards: Not included (mounting points available)
Cargo rack: Not included (mounting points available)

Electrical System

Voltage: 48 V DC
Motor controller: BLDC sine-wave, waterproof (IP65)
Torque sensor: Cadence-based with load sensing
Sensor precision: ±2 Nm
Throttle: N/A (pedelec only – no throttle)
Safety cut-off: Instant motor shutdown on brake activation
Regenerative braking: Not available (direct-drive hub)
Power draw (idle): approx. 2 W
Power draw (max): approx. 250 W continuous / 750 W peak (boost)

Battery Specifications

Cell type: Lithium-ion (LG 21700 format)
Cell count: 13S5P (13 cells in series, 5 in parallel)
BMS (Battery Management System): Integrated, active balancing
Cell balancing: Automatic
Over-current protection: Yes (50 A fuse)
Over-voltage protection: Yes (58.8 V)
Under-voltage protection: Yes (39 V cut-off)
Temperature monitoring: Yes (−10 to +60 °C operating range)
Charge temperature range: 0–45 °C (recommended: 15–25 °C)
Discharge temperature range: −10 to +60 °C
Charge port: XT90-S (anti-spark)
Connector type: Waterproof, IP65-rated
Charge indicator: LED lights on charger
Full-charge time: approx. 5–6 hours (with 600 W charger)
Charge cycles to 80 %: approx. 800–1000
Battery lifespan: approx. 3–5 years with proper care
Storage: Cool, dry location (10–25 °C)
Disposal: Return to authorised recycling centre (battery contains hazardous materials)

Charger Specifications

Input: 100–240 V AC, 50–60 Hz
Output: 48 V DC, 2.5 A (600 W)
Connector: XT90-S (compatible with battery)
Charge time: 5–6 hours (0–100 %)
Smart charging: Automatic cut-off at full charge
Overcharge protection: Yes
Over-current protection: Yes
Temperature sensor: Yes (charging stops if charger overheats)
Waterproof rating: IP44
Cable length: approx. 2 m
Certification: CE, FCC (where applicable)

Warranty & Replacement Policy

Frame: 2 years from purchase date (manufacturing defects, excluding accidental damage, rust from neglect, or paint damage)
Motor and drivetrain: 2 years (defects in materials or workmanship; wear items excluded)
Battery: 1 year (capacity below 80 % is not covered; chemistry degradation is normal)
Brakes and suspension: 1 year (wear items and seal degradation excluded)
Electrical components: 1 year (water damage excluded unless due to manufacturing fault)
Charger: 1 year (defects in materials or workmanship)
Warranty conditions: Product must be registered within 30 days of purchase; warranty is void if the e-bike has been modified, disassembled by unauthorised persons, or subjected to misuse
Replacement or repair: We will, at our sole discretion, repair or replace defective parts at no cost during the warranty period (labour and return shipping excluded unless caused by manufacturing defect)
Non-warranty repairs: Available at cost; contact customer support for a quote

What's Included in the Box

E-bike frame and fork (assembled)
Motor and integrated battery pack
Handlebars and stem (pre-fitted)
Saddle and seat post
Pedals (foldable)
Display and control buttons
Front wheel (20", assembled)
Rear wheel (20", assembled) with motor integrated
Hydraulic front suspension (pre-assembled)
Hydraulic disc brakes (front and rear, bled and ready to ride)
Charger (48 V, 2.5 A)
Quick-start guide (English)
Warranty card and registration form
Hex key set (for basic adjustments)
Spare inner tube (20" × 1.95")
Repair patch kit

Optional Accessories

Mudguards (front and rear, 20")
Cargo rack (rear, 20 kg capacity)
Lights (front USB-rechargeable, rear LED)
Kickstand (side-stand, adjustable)
Phone mount (handlebar, universal)
Spare battery (48 V, 15 Ah, 720 Wh)
Replacement battery cells (service option)
Replacement brake pads (organic resin)
Suspension service kit (oil, seals)
Replacement tyres (20" × 1.95", all-terrain)
Fenders and aesthetic add-ons

Shipping, Delivery & Returns

This e-bike is shipped in a heavy-duty cardboard box with protective foam padding. Unpacking, basic assembly (pedals, handlebars, saddle height), and charging are required before first use.

Unboxing checklist:

Visually inspect for shipping damage before opening
Check that all components listed above are present
Charge the battery fully (5–6 hours) before first ride
Inflate tyres to 55 psi
Check brake function and hydraulic line integrity
Test motor assistance at low speed in a safe area

We recommend professional assembly by a local bike shop if you are not confident in basic maintenance.

Delivery times and lithium-battery shipping restrictions vary by carrier and destination. Confirm the applicable transport requirements before dispatch. Customs duties and import taxes may apply in some regions.

Returns are subject to our full Returns Policy. E-bikes must be unused and in original packaging for a full refund. Opened or used e-bikes may be refused or subject to a restocking fee.

For further information or technical support, contact our customer service team.