China Mountain Bike Digital Bicycle Speedometer Manufacturer

Technical Specifications

Application Considerations

Mountain bike frames expose components to repeated shock loads from rocks, roots, and drops. The speedometer’s housing incorporates internal ribs that distribute impact forces, reducing peak stress on the PCB by roughly 30 % compared with a plain wall design.

Water ingress is prevented by a laser‑welded seam and a silicone gasket around the lens, achieving IP67 rating without compromising button tactile feedback. This allows the unit to remain functional after submersion in shallow streams or heavy rain.

The sensor magnet is mounted on the spoke with a non‑magnetic stainless‑steel clamp, ensuring consistent pulse generation even when the wheel experiences lateral flex. Calibration is performed in‑factory using a reference wheel rotating at 500 rpm, yielding a speed error under ±0.5 % across the full range.

Customization Options

• Display backlight color: white, amber, or red (selected via firmware)
• Unit of speed: km/h or mph (user‑selectable toggle)
• Mounting bracket: handlebar diameter 22.2 mm, 25.4 mm, or 31.8 mm with silicone insert
• Logo placement: laser‑etched on housing top or bottom surface (maximum area 15 mm × 15 mm)
• Firmware functions: odometer, trip timer, average speed, max speed, cadence (optional external sensor)

Quality Control & Testing

Each unit undergoes a three‑stage validation: (1) incoming sensor sensitivity check (±2 % tolerance), (2) functional test on a programmable bike simulator covering 0‑80 km/h with random vibration profiles, (3) environmental soak at 85 °C/85 % RH for 48 hours followed by thermal cycling (‑20 °C ↔ +60 °C, 10 cycles). Units failing any stage are removed from the line.

Statistical process control monitors key dimensions of the housing (wall thickness 2.0 mm ± 0.1 mm) and sensor gap (0.8 mm ± 0.05 mm). Capability indices (Cp, Cpk) are maintained above 1.33 for these characteristics, ensuring consistent fit and sealing performance.

Packaging & Shipping

Products are packed in recyclable corrugated cartons with a single‑wall thickness of 3 mm. Each carton contains 20 speedometers, separated by anti‑static foam inserts that prevent movement during transit. A desiccant packet (5 g silica gel) is included to control humidity inside the package.

Carton dimensions are 380 mm × 260 mm × 120 mm, giving a volumetric weight of approximately 4.5 kg. Palletization follows ISO 6780 standards, with 48 cartons per pallet (≈ 216 kg gross). Shipping marks include handling symbols for “Keep Dry” and “This Side Up”.

Lead Time & Sampling

Standard lead time for stock‑keeping units (SKUs) with no custom branding is 15 working days after receipt of purchase order. For customized housings or firmware, lead time extends to 25 working days, which includes tooling preparation and pilot‑run approval.

Sample units are available upon request; the customer covers sample cost and express shipping. A sample batch of up to five pieces can be dispatched within five working days after confirmation of specifications.

Frequently Asked Questions

• Can the sensor gap be adjusted for different wheel sizes? The Hall‑effect sensor is fixed; however, the magnet position on the spoke can be moved to accommodate rim diameters from 559 mm to 622 mm while maintaining the required gap.
• What information is needed for a quotation? Required details include: desired quantity, any housing color or logo specifications, preferred backlight color, required firmware functions, and delivery destination.
• Which materials are available for the housing? Standard material is UV‑stabilized polycarbonate; alternative ABS blends or glass‑filled nylon can be supplied upon request for specific impact or chemical resistance needs.
• How is product quality inspected before shipment? Final inspection includes visual check, functional test on a calibrated bike simulator, and verification of IP67 sealing via pressure‑decay method. AQL 0.65 is applied for critical defects.
• What packaging options exist for long‑distance transport? In addition to the standard carton, double‑wall cartons with corner protectors and wooden pallets are available for high‑vibration routes.
• What is the typical production lead time? As noted, 15 working days for standard SKUs and up to 25 working days for customized orders, subject to component availability.

Contact for Inquiry

To obtain a formal quotation or request technical drawings, please reach out via the contact form. Provide your project specifics, and our engineering team will respond with a detailed proposal within two business days.

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