1. Product Overview
The ROCKBROS HW-140 Tiny Emergency Bike Pump is a compact and portable electric air pump designed for quick inflation of bicycle tires and sports balls. It features a digital display for real-time pressure monitoring, compatibility with both Presta and Schrader valves, and a maximum pressure output of 150 PSI. Its small size and included silicone protective cover make it ideal for on-the-go use.
2. Package Contents
Please verify that all items listed below are included in your package:
- Tire Inflator (HW-140)
- Hose (Inflatable Tube)
- Ball Needle
- Silicone Case
- USB Charging Cable (Type-C)
- User Manual
- Presta Valve Converter
- Pilar (Valve Core Tool)
- Seal Port (replaceable wear part)
- Valve Seals (2 pieces)
Image: The ROCKBROS HW-140 pump, inflatable tube, ball needle, valve seals, and USB-C charging cable.
3. Key Features
- Dual Valve Compatibility: Supports both Schrader and Presta valves with a 2-in-1 design and an additional air hose.
- LED Digital Display: Provides real-time battery level and pressure value readings.
- Wide Application: Suitable for road bikes, mountain bikes, basketballs, footballs, and other inflatables.
- Quick Charge & Preset Pressure: Allows for setting desired pressure values and inflates quickly. A full charge can inflate one 700*25C tire from 0 to 110 PSI.
- Silicone Protective Cover: Insulates heat during operation and protects the device from scratches and water.
- Compact and Portable: Weighs only 186g, making it easy to carry.
Image: The ROCKBROS HW-140 pump with its anti-scald silicone protective case, highlighting its light weight (186g) and portability.
4. Setup Guide
4.1 Charging the Pump
Before initial use, fully charge the pump. Connect the provided USB Type-C charging cable to the pump's charging port and to a standard USB power adapter (not included). The LED display will indicate the battery level. A full charge for the 500mAh battery typically takes approximately 1.5 hours.
Image: The ROCKBROS HW-140 pump connected to a USB-C charging cable, illustrating the charging process and battery level indicators on the LED screen.
4.2 Attaching the Valve Adapter
The pump is compatible with both Schrader and Presta valves. You can use the pump directly or with the included elastic air hose.
- For Schrader Valves: The pump's direct connection or the hose end with the larger opening is typically used. Ensure the Schrader valve kit (air nozzle thimble) is correctly installed if using the hose.
- For Presta Valves: Use the Presta valve converter or the hose end with the smaller opening. Ensure the Presta valve is opened before connecting the pump.
Image: A diagram illustrating the components for connecting to Schrader and Presta valves, including valve caps, sealing rings, and the Schrader valve kit.
Image: Demonstrates the flexibility of using the ROCKBROS HW-140 pump directly on a tire valve or with the elastic air hose for easier access.
5. Operating Instructions
5.1 Powering On/Off and Display
Press and hold the power button (usually the middle button) to turn the pump on or off. The LED digital display will show the current battery level and real-time pressure value. Use the '+' and '-' buttons to adjust settings.
Image: The ROCKBROS HW-140 pump's LED screen displaying current pressure (0.0 PSI) and battery level, with control buttons visible.
5.2 Setting Preset Pressure
Before inflating, connect the pump to the item. The display will show the current pressure. Use the '+' and '-' buttons to set your desired target pressure. The pump will automatically stop once the preset pressure is reached.
5.3 Inflation Process
- Ensure the pump is charged and the correct valve adapter is attached.
- Connect the pump securely to the tire valve or ball needle.
- Power on the pump. The current pressure will be displayed.
- Adjust the target pressure using the '+' and '-' buttons.
- Press the power button to start inflation.
- The pump will automatically stop when the preset pressure is achieved.
- Disconnect the pump from the valve.
Video: Demonstration of the ROCKBROS HW-140 mini bike pump inflating a bicycle tire, showing the digital pressure display in action.
Image: Table illustrating inflation times and usable cycles for different tire types (26x1.95 and 700*25C) and pressure ranges, up to 150 PSI.
5.4 Inflation Performance Table
The following table provides approximate inflation times and cycles based on a fully charged pump:
| Tire Type | Pressure Range | Inflation Time | Usable Cycles |
|---|---|---|---|
| 700*25C | 0-60 PSI | 40-60s | 2-3 |
| 700*25C | 0-80 PSI | 65-100s | 1-2 |
| 700*25C | 0-100 PSI | 120-150s | 1 |
| 26x1.95 | 0-35 PSI | 70-80s | 2 |
| 26x1.95 | 0-50 PSI | 120-130s | 1 |
Note: Inflation times and usable cycles may vary based on tire condition, ambient temperature, and battery charge level.
6. Maintenance
- Cleaning: Wipe the pump with a soft, damp cloth. Do not use harsh chemicals or immerse the device in water.
- Storage: Store the pump in a cool, dry place away from direct sunlight and extreme temperatures. Ensure it is fully charged before long-term storage.
- Seal Port: The seal port is a replaceable wear part. If you notice reduced performance or air leakage from the connection point, inspect the seal port and replace it if necessary using the included spare.
- Silicone Cover: Keep the silicone protective cover clean to maintain its insulating and protective properties.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not turn on. | Low battery or no charge. | Charge the pump fully using the USB-C cable. |
| Pump inflates slowly or not at all. | Incorrect valve connection; Seal port worn; Low battery. | Ensure secure connection. Check and replace seal port if needed. Recharge the pump. |
| Inaccurate pressure reading. | Loose connection; Sensor malfunction. | Ensure the connection is tight. If problem persists, contact customer support. |
| Pump overheats during use. | Extended continuous operation. | Allow the pump to cool down. The silicone cover helps with heat insulation. Avoid prolonged continuous use. |
| Air leaks from connection. | Loose connection; Worn valve seal/seal port. | Tighten the connection. Inspect and replace valve seals or the seal port. |
8. Specifications
- Brand: ROCKBROS
- Model: HW-140
- Color: Black
- Material: Aluminum, Plastic
- Product Dimensions (L x W x H): 2" x 1.3" x 2.95" (5.1cm x 3.3cm x 7.5cm approx.)
- Power Source: Battery Powered
- Maximum Pressure: 150 PSI (Pascal)
- Operation Mode: Automatic
- Battery Type: Lithium-ion
- Battery Capacity: 500mAh
- Charging Time: Approximately 1.5 hours
- Included Components: Tire Inflator, Hose, Ball Needle, Silicone Case, USB Charging Cable, User Manual, Presta Valve Converter, Pilar, Seal Port
Image: Detailed view of the ROCKBROS HW-140 pump showing its compact dimensions (approx. 9cm height, 5.1cm width, 3.3cm depth) and included accessories.
9. Warranty Information
The ROCKBROS HW-140 Tiny Emergency Bike Pump comes with a 1 Year Manufacturer Warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. The warranty does not cover damage caused by misuse, accident, unauthorized modification, or normal wear and tear.
10. Customer Support
For any questions, technical assistance, or warranty claims, please contact ROCKBROS USA customer service. You can find contact information on the official ROCKBROS website or through your purchase platform.
Visit the official ROCKBROS Store: ROCKBROS Store on Amazon
