BK-BM04 - Electric bike SHARP - Free user manual and instructions
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| Product type | Electric bike |
| Brand | SHARP |
| Model | BK-BM04 |
| Usage | Urban and leisure |
| Motorization | Rear wheel motor 250 W |
| Battery | Lithium-ion 36 V 10 Ah |
| Range | 40 to 60 km depending on assistance |
| Maximum speed | 25 km/h (electric assistance) |
| Total weight | 22 kg |
| Maximum load | 120 kg |
| Wheel size | 26 inches |
| Brake type | Mechanical disc brakes |
| Transmission | 7 speeds on the handlebar |
| Display | LCD screen (speed, distance, battery level) |
| Assistance modes | 3 levels (eco, comfort, sport) |
| Lighting | Front LED light and rear light |
| Frame material | Aluminum |
| Tires | 26 x 1.95 with inner tubes |
| Maintenance | Check tire pressure, brakes, and tightenings regularly |
| Cleaning | Soft damp cloth, avoid high-pressure cleaner |
| Safety | Compliant with EN 15194 standard, lighting and bell included |
| Spare parts | Available via SHARP after-sales service |
Frequently Asked Questions - BK-BM04 SHARP
How to recharge the battery of the SHARP BK-BM04 electric bike?
Remove the battery from the frame using the key, plug the supplied charger into a household outlet, then connect the battery. The charging cycle lasts about 4 to 6 hours. An LED indicator shows the end of charge. Use only the original charger to avoid any risk.
What is the actual range of the bike under normal conditions?
The range varies depending on the assistance mode, cyclist weight, terrain, and tire pressure. In eco mode, you can reach 60 km; in sport mode, it is reduced to about 40 km. Remember to recharge the battery after each use to extend its lifespan.
Can the bike be used without the battery or with an empty battery?
Yes, the BK-BM04 can be used like a regular bike. The motor resistance is low, but the higher weight (22 kg) makes pedaling more difficult, especially uphill. We recommend always keeping a minimum charge to benefit from start-up assistance.
How to maintain the disc brakes?
Check the wear of the pads and the alignment of the calipers every two weeks. If braking becomes less effective, tighten the cable or bleed the system if necessary. Clean the discs with a specific product and avoid any contact with oil. Replace the pads if the thickness is less than 1.5 mm.
What tire pressure is recommended for this bike?
The recommended pressure is written on the tire sidewall. In general, for the 26 x 1.95 tire, it ranges between 2.5 and 4.5 bars. Proper pressure improves comfort and reduces the risk of punctures. Check the pressure monthly with a gauge.
How to adjust the LCD screen on the dashboard?
Turn on the screen by pressing the power button. Use the + and - keys to scroll through the information (speed, distance, battery level). A long press on the mode key allows you to set the unit (km/h or mph) and reset the trip meter. Consult the manual for advanced settings.
Is the bike foldable for transport?
No, the frame is not foldable. However, the front wheel is equipped with a quick release that allows removal for easier transport in a trunk. Remember to secure the bike with a sturdy lock, as it weighs 22 kg and can be difficult to carry over long distances.
What accessories are included with the BK-BM04 bike?
The bike comes with a battery charger, keys for battery locking, a bell, reflectors, and a multifunction tool for basic adjustments. The front and rear lights are integrated. The user manual is provided in several languages.
How to maintain the chain and derailleur?
Clean the chain with a degreaser every 500 km, then lubricate it with a suitable product. Check the chain tension (no more than 10 mm of play). For the derailleur, check the limit stop and cable tension. If the gears skip, adjust the setting via the knob on the derailleur. Regular maintenance extends the lifespan of the drivetrain.
What to do if the motor no longer starts?
First check that the battery is charged and properly connected. Then inspect the electrical connections, especially at the wheel and controller. If the screen indicator is on but the motor does not respond, test the assistance mode and the pedal sensor. In case of persistent failure, contact a SHARP approved workshop or after-sales service.
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USER MANUAL BK-BM04 SHARP
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Product information
Brand : SHARP
Model : BK-BM04
Category : Electric bike