ODM Rechargeable Cycling Bicycle Speedometer Exporter

This product is a compact, wireless speedometer designed for bicycles that measures wheel rotations and converts them to speed and distance readings. It incorporates a rechargeable lithium‑polymer battery, Hall‑effect sensor, and Bluetooth‑low‑energy module for data transmission to a handlebar‑mounted display or smartphone app.

Technical Specifications

The sensing unit uses a non‑contact Hall sensor with a detection range of 0.5 mm to 2 mm from the magnet attached to the spoke, providing a resolution of 0.1 km/h at speeds up to 60 km/h. Power consumption during active measurement is below 8 mA, allowing continuous operation for approximately 25 hours on a 120 mAh battery.

Charging is performed via a USB‑C port with a 5 V/500 mA input, reaching 80 % capacity in 45 minutes and full charge in 90 minutes. The unit includes over‑voltage and over‑temperature protection circuits to safeguard the cell during repeated charge cycles.

Wireless communication employs Bluetooth 5.0 with a typical range of 10 m in open air, transmitting data packets at 20 Hz to ensure smooth speed updates on the display. The firmware supports OTA updates, enabling future feature enhancements without physical access.

Design and Materials

The enclosure is molded from UV‑stabilized polycarbonate (PC) with a tensile strength of 60 MPa and impact resistance exceeding 5 J, suitable for outdoor exposure. Silicone gaskets provide an IP67 rating, preventing ingress of dust and temporary immersion up to 1 meter for 30 minutes.

Internal PCB uses FR‑4 substrate with 1.6 mm thickness, copper thickness of 35 µm, and a solder mask that meets UL‑94 V‑0 flame retardancy. Components are selected for automotive temperature range (−40 °C to +85 °C) to ensure reliability under varying climatic conditions.

Typical Applications

• Road bicycles where aerodynamics and minimal weight are critical; the sensor adds less than 5 g to the wheel assembly.
• Mountain bikes requiring rugged sealing; the IP67 enclosure withstands mud, water spray, and shock from trail impacts.
• Urban commuting bikes that benefit from Bluetooth connectivity to smartphone navigation apps for ride logging.
• Fleet‑managed rental services needing tamper‑proof, rechargeable units to reduce maintenance visits.

Customization Options

Quality Control Philosophy

Each unit undergoes a three‑stage validation: incoming sensor verification (±0.05 % tolerance), functional test of Bluetooth link and battery charge/discharge cycles (minimum 300 cycles), and final environmental stress test (thermal shock −20 °C to +60 °C, humidity 85 % RH for 24 h). Statistical process control charts monitor critical dimensions of the sensor gap and PCB warpage to maintain repeatability.

Traceability is achieved via laser‑etched serial numbers linking to production lot, test results, and material certificates. This enables rapid root‑cause analysis should a field anomaly arise.

Frequently Asked Questions

Can the mounting bracket be adapted to different handlebar diameters? Yes, the bracket design incorporates a removable shim system accommodating 22.2 mm, 25.4 mm, and 31.8 mm bar sizes.

What information is required before a quotation? Desired battery capacity, housing color, any additional sensor inputs (cadence, torque), target certification, and estimated annual volume.

How are export shipments protected? Units are packed in anti‑static bubble wrap, placed in corrugated cartons with corner protectors, and sealed with humidity‑indicating cards to monitor moisture during transit.

What is the typical production lead time? For standard configurations, lead time is 4‑6 weeks after receipt of approved artwork and deposit; custom projects are quoted case‑by‑case.

Contact for Inquiry

To discuss your specific requirements or request a sample, please reach out via the contact form. Our technical team will respond with a detailed feasibility study and pricing within two business days.